nix flake: error: attribute 'enableIPv6' missing

[benjamb]

There appears to be a conflict with using config.networking.enableIPv6 as a default value for networking.stevenBlackHosts.enableIPv6 when documentation.nixos.includeAllModules is also enabled on a system.

The enableIPv6 option was introduced in #2803.

Minimal reproduction flake.nix:

{
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-24.11";
    hosts = {
      url = "github:StevenBlack/hosts";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = {
    nixpkgs,
    hosts,
    ...
  }: let
    system = "x86_64-linux";
  in {
    nixosConfigurations.hostname = nixpkgs.lib.nixosSystem {
      inherit system;
      modules = [
        ./hardware-configuration.nix
        {
          boot.loader.systemd-boot.enable = true;
          networking.stevenBlackHosts.enable = true;
          documentation.nixos.includeAllModules = true;
        }
        hosts.nixosModule
      ];
    };
  };
}

Output of nixos-rebuild build --show-trace --flake .:

building the system configuration...
evaluation warning: system.stateVersion is not set, defaulting to 24.11. Read why this matters on https://nixos.org/manual/nixos/stable/options.html#opt-system.stateVersion.
error:
       … while calling anonymous lambda
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/attrsets.nix:1570:24:
         1569|     let f = attrPath:
         1570|       zipAttrsWith (n: values:
             |                        ^
         1571|         let here = attrPath ++ [n]; in

       … while calling the 'head' builtin
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/attrsets.nix:1574:11:
         1573|         || pred here (elemAt values 1) (head values) then
         1574|           head values
             |           ^
         1575|         else

       … while calling anonymous lambda
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/attrsets.nix:1204:18:
         1203|         mapAttrs
         1204|           (name: value:
             |                  ^
         1205|             if isAttrs value && cond value

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/attrsets.nix:1207:18:
         1206|             then recurse (path ++ [ name ]) value
         1207|             else f (path ++ [ name ]) value);
             |                  ^
         1208|     in

       … while calling anonymous lambda
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:254:72:
          253|           # For definitions that have an associated option
          254|           declaredConfig = mapAttrsRecursiveCond (v: ! isOption v) (_: v: v.value) options;
             |                                                                        ^
          255|

       … while evaluating the attribute 'value'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:816:9:
          815|     in warnDeprecation opt //
          816|       { value = addErrorContext "while evaluating the option `${showOption loc}':" value;
             |         ^
          817|         inherit (res.defsFinal') highestPrio;

       … while evaluating the option `system.build.toplevel':

       … while evaluating the attribute 'mergedValue'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:851:5:
          850|     # Type-check the remaining definitions, and merge them. Or throw if no definitions.
          851|     mergedValue =
             |     ^
          852|       if isDefined then

       … while evaluating a branch condition
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:852:7:
          851|     mergedValue =
          852|       if isDefined then
             |       ^
          853|         if all (def: type.check def.value) defsFinal then type.merge loc defsFinal

       … while evaluating the attribute 'values'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:845:9:
          844|       in {
          845|         values = defs''';
             |         ^
          846|         inherit (defs'') highestPrio;

       … while evaluating a branch condition
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:841:11:
          840|           # Avoid sorting if we don't have to.
          841|           if any (def: def.value._type or "" == "order") defs''.values
             |           ^
          842|           then sortProperties defs''.values

       … while calling the 'any' builtin
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:841:14:
          840|           # Avoid sorting if we don't have to.
          841|           if any (def: def.value._type or "" == "order") defs''.values
             |              ^
          842|           then sortProperties defs''.values

       … while evaluating the attribute 'values'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:944:7:
          943|     in {
          944|       values = concatMap (def: if getPrio def == highestPrio then [(strip def)] else []) defs;
             |       ^
          945|       inherit highestPrio;

       … while calling the 'concatMap' builtin
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:944:16:
          943|     in {
          944|       values = concatMap (def: if getPrio def == highestPrio then [(strip def)] else []) defs;
             |                ^
          945|       inherit highestPrio;

       … while calling the 'concatMap' builtin
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:831:17:
          830|         # Process mkMerge and mkIf properties.
          831|         defs' = concatMap (m:
             |                 ^
          832|           map (value: { inherit (m) file; inherit value; }) (addErrorContext "while evaluating definitions from `${m.file}':" (dischargeProperties m.value))

       … while calling anonymous lambda
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:831:28:
          830|         # Process mkMerge and mkIf properties.
          831|         defs' = concatMap (m:
             |                            ^
          832|           map (value: { inherit (m) file; inherit value; }) (addErrorContext "while evaluating definitions from `${m.file}':" (dischargeProperties m.value))

       … while calling the 'map' builtin
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:832:11:
          831|         defs' = concatMap (m:
          832|           map (value: { inherit (m) file; inherit value; }) (addErrorContext "while evaluating definitions from `${m.file}':" (dischargeProperties m.value))
             |           ^
          833|         ) defs;

       … while evaluating definitions from `/nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/nixos/modules/system/activation/top-level.nix':

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:832:128:
          831|         defs' = concatMap (m:
          832|           map (value: { inherit (m) file; inherit value; }) (addErrorContext "while evaluating definitions from `${m.file}':" (dischargeProperties m.value))
             |                                                                                                                                ^
          833|         ) defs;

       … while calling 'dischargeProperties'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:903:25:
          902|   */
          903|   dischargeProperties = def:
             |                         ^
          904|     if def._type or "" == "merge" then

       … while evaluating a branch condition
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:904:5:
          903|   dischargeProperties = def:
          904|     if def._type or "" == "merge" then
             |     ^
          905|       concatMap dischargeProperties def.contents

       … while evaluating the attribute 'value'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:614:53:
          613|                 (n: value:
          614|                   [{ inherit (module) file; inherit value; }]
             |                                                     ^
          615|                 )

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/nixos/modules/system/activation/top-level.nix:74:10:
           73|     then throw "\nFailed assertions:\n${concatStringsSep "\n" (map (x: "- ${x}") failedAssertions)}"
           74|     else showWarnings config.warnings baseSystem;
             |          ^
           75|

       … while calling 'showWarnings'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/trivial.nix:972:28:
          971|
          972|   showWarnings = warnings: res: lib.foldr (w: x: warn w x) res warnings;
             |                            ^
          973|

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/trivial.nix:972:33:
          971|
          972|   showWarnings = warnings: res: lib.foldr (w: x: warn w x) res warnings;
             |                                 ^
          973|

       … while calling 'foldr'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/lists.nix:122:20:
          121|   */
          122|   foldr = op: nul: list:
             |                    ^
          123|     let

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/lists.nix:129:8:
          128|         else op (elemAt list n) (fold' (n + 1));
          129|     in fold' 0;
             |        ^
          130|

       … while calling 'fold''
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/lists.nix:125:15:
          124|       len = length list;
          125|       fold' = n:
             |               ^
          126|         if n == len

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/nixos/modules/system/activation/top-level.nix:54:16:
           53|   # makes it bootable. See `activatable-system.nix`.
           54|   baseSystem = pkgs.stdenvNoCC.mkDerivation ({
             |                ^
           55|     name = "nixos-system-${config.system.name}-${config.system.nixos.label}";

       … while calling 'mkDerivation'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/pkgs/stdenv/generic/make-derivation.nix:64:5:
           63|   mkDerivation =
           64|     fnOrAttrs:
             |     ^
           65|       if builtins.isFunction fnOrAttrs

       … while evaluating a branch condition
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/pkgs/stdenv/generic/make-derivation.nix:65:7:
           64|     fnOrAttrs:
           65|       if builtins.isFunction fnOrAttrs
             |       ^
           66|       then makeDerivationExtensible fnOrAttrs

       … while calling the 'isFunction' builtin
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/pkgs/stdenv/generic/make-derivation.nix:65:10:
           64|     fnOrAttrs:
           65|       if builtins.isFunction fnOrAttrs
             |          ^
           66|       then makeDerivationExtensible fnOrAttrs

       … in the right operand of the update (//) operator
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/nixos/modules/system/activation/top-level.nix:66:5:
           65|     inherit (config.system) extraDependencies;
           66|   } // config.system.systemBuilderArgs);
             |     ^
           67|

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/nixos/modules/system/activation/top-level.nix:66:8:
           65|     inherit (config.system) extraDependencies;
           66|   } // config.system.systemBuilderArgs);
             |        ^
           67|

       … while calling anonymous lambda
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/attrsets.nix:1204:18:
         1203|         mapAttrs
         1204|           (name: value:
             |                  ^
         1205|             if isAttrs value && cond value

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/attrsets.nix:1207:18:
         1206|             then recurse (path ++ [ name ]) value
         1207|             else f (path ++ [ name ]) value);
             |                  ^
         1208|     in

       … while calling anonymous lambda
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:254:72:
          253|           # For definitions that have an associated option
          254|           declaredConfig = mapAttrsRecursiveCond (v: ! isOption v) (_: v: v.value) options;
             |                                                                        ^
          255|

       … while evaluating the attribute 'value'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:816:9:
          815|     in warnDeprecation opt //
          816|       { value = addErrorContext "while evaluating the option `${showOption loc}':" value;
             |         ^
          817|         inherit (res.defsFinal') highestPrio;

       … while evaluating the option `system.systemBuilderArgs':

       … while evaluating the attribute 'mergedValue'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:851:5:
          850|     # Type-check the remaining definitions, and merge them. Or throw if no definitions.
          851|     mergedValue =
             |     ^
          852|       if isDefined then

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:853:59:
          852|       if isDefined then
          853|         if all (def: type.check def.value) defsFinal then type.merge loc defsFinal
             |                                                           ^
          854|         else let allInvalid = filter (def: ! type.check def.value) defsFinal;

       … while calling 'merge'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/types.nix:576:20:
          575|       check = isAttrs;
          576|       merge = loc: defs:
             |                    ^
          577|         mapAttrs (n: v: v.value) (filterAttrs (n: v: v ? value) (zipAttrsWith (name: defs:

       … while calling the 'mapAttrs' builtin
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/types.nix:577:9:
          576|       merge = loc: defs:
          577|         mapAttrs (n: v: v.value) (filterAttrs (n: v: v ? value) (zipAttrsWith (name: defs:
             |         ^
          578|             (mergeDefinitions (loc ++ [name]) elemType defs).optionalValue

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/types.nix:577:35:
          576|       merge = loc: defs:
          577|         mapAttrs (n: v: v.value) (filterAttrs (n: v: v ? value) (zipAttrsWith (name: defs:
             |                                   ^
          578|             (mergeDefinitions (loc ++ [name]) elemType defs).optionalValue

       … while calling 'filterAttrs'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/attrsets.nix:646:5:
          645|     pred:
          646|     set:
             |     ^
          647|     removeAttrs set (filter (name: ! pred name set.${name}) (attrNames set));

       … while calling the 'removeAttrs' builtin
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/attrsets.nix:647:5:
          646|     set:
          647|     removeAttrs set (filter (name: ! pred name set.${name}) (attrNames set));
             |     ^
          648|

       … while calling the 'filter' builtin
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/attrsets.nix:647:22:
          646|     set:
          647|     removeAttrs set (filter (name: ! pred name set.${name}) (attrNames set));
             |                      ^
          648|

       … while calling anonymous lambda
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/attrsets.nix:647:30:
          646|     set:
          647|     removeAttrs set (filter (name: ! pred name set.${name}) (attrNames set));
             |                              ^
          648|

       … in the argument of the not operator
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/attrsets.nix:647:38:
          646|     set:
          647|     removeAttrs set (filter (name: ! pred name set.${name}) (attrNames set));
             |                                      ^
          648|

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/attrsets.nix:647:38:
          646|     set:
          647|     removeAttrs set (filter (name: ! pred name set.${name}) (attrNames set));
             |                                      ^
          648|

       … while calling anonymous lambda
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/types.nix:577:51:
          576|       merge = loc: defs:
          577|         mapAttrs (n: v: v.value) (filterAttrs (n: v: v ? value) (zipAttrsWith (name: defs:
             |                                                   ^
          578|             (mergeDefinitions (loc ++ [name]) elemType defs).optionalValue

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/attrsets.nix:647:48:
          646|     set:
          647|     removeAttrs set (filter (name: ! pred name set.${name}) (attrNames set));
             |                                                ^
          648|

       … while calling anonymous lambda
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/types.nix:577:86:
          576|       merge = loc: defs:
          577|         mapAttrs (n: v: v.value) (filterAttrs (n: v: v ? value) (zipAttrsWith (name: defs:
             |                                                                                      ^
          578|             (mergeDefinitions (loc ++ [name]) elemType defs).optionalValue

       … while evaluating the attribute 'optionalValue'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:863:5:
          862|
          863|     optionalValue =
             |     ^
          864|       if isDefined then { value = mergedValue; }

       … while evaluating a branch condition
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:864:7:
          863|     optionalValue =
          864|       if isDefined then { value = mergedValue; }
             |       ^
          865|       else {};

       (8 duplicate frames omitted)

       … while evaluating definitions from `/nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/nixos/modules/system/activation/activatable-system.nix':

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:832:128:
          831|         defs' = concatMap (m:
          832|           map (value: { inherit (m) file; inherit value; }) (addErrorContext "while evaluating definitions from `${m.file}':" (dischargeProperties m.value))
             |                                                                                                                                ^
          833|         ) defs;

       … while calling 'dischargeProperties'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:903:25:
          902|   */
          903|   dischargeProperties = def:
             |                         ^
          904|     if def._type or "" == "merge" then

       … while evaluating a branch condition
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:904:5:
          903|   dischargeProperties = def:
          904|     if def._type or "" == "merge" then
             |     ^
          905|       concatMap dischargeProperties def.contents

       … while evaluating the attribute 'value'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/types.nix:581:60:
          580|           # Push down position info.
          581|           (map (def: mapAttrs (n: v: { inherit (def) file; value = v; }) def.value) defs)));
             |                                                            ^
          582|       emptyValue = { value = {}; };

       … while evaluating the attribute 'system.activationScripts.script'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/nixos/modules/system/activation/activation-script.nix:140:9:
          139|       apply = set: set // {
          140|         script = systemActivationScript set false;
             |         ^
          141|       };

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/nixos/modules/system/activation/activation-script.nix:140:18:
          139|       apply = set: set // {
          140|         script = systemActivationScript set false;
             |                  ^
          141|       };

       … while calling 'systemActivationScript'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/nixos/modules/system/activation/activation-script.nix:20:33:
           19|
           20|   systemActivationScript = set: onlyDry: let
             |                                 ^
           21|     set' = mapAttrs (_: v: if isString v then (noDepEntry v) // { supportsDryActivation = false; } else v) set;

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/nixos/modules/system/activation/activation-script.nix:51:9:
           50|
           51|       ${textClosureMap id (withDrySnippets) (attrNames withDrySnippets)}
             |         ^
           52|

       … while calling 'textClosureMap'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/strings-with-deps.nix:75:35:
           74|
           75|   textClosureMap = f: predefined: names:
             |                                   ^
           76|     concatStringsSep "\n" (map f (textClosureList predefined names));

       … while calling the 'concatStringsSep' builtin
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/strings-with-deps.nix:76:5:
           75|   textClosureMap = f: predefined: names:
           76|     concatStringsSep "\n" (map f (textClosureList predefined names));
             |     ^
           77|

       … while calling 'id'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/trivial.nix:39:8:
           38|   */
           39|   id = x: x;
             |        ^
           40|

       … while evaluating the attribute 'text'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/nixos/modules/system/activation/activation-script.nix:9:5:
            8|   addAttributeName = mapAttrs (a: v: v // {
            9|     text = ''
             |     ^
           10|       #### Activation script snippet ${a}:

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/nixos/modules/system/activation/activation-script.nix:12:9:
           11|       _localstatus=0
           12|       ${v.text}
             |         ^
           13|

       … while calling anonymous lambda
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/attrsets.nix:1204:18:
         1203|         mapAttrs
         1204|           (name: value:
             |                  ^
         1205|             if isAttrs value && cond value

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/attrsets.nix:1207:18:
         1206|             then recurse (path ++ [ name ]) value
         1207|             else f (path ++ [ name ]) value);
             |                  ^
         1208|     in

       … while calling anonymous lambda
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:254:72:
          253|           # For definitions that have an associated option
          254|           declaredConfig = mapAttrsRecursiveCond (v: ! isOption v) (_: v: v.value) options;
             |                                                                        ^
          255|

       … while evaluating the attribute 'value'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:816:9:
          815|     in warnDeprecation opt //
          816|       { value = addErrorContext "while evaluating the option `${showOption loc}':" value;
             |         ^
          817|         inherit (res.defsFinal') highestPrio;

       … while evaluating the option `system.activationScripts.etc.text':

       (10 duplicate frames omitted)

       … while evaluating definitions from `/nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/nixos/modules/system/etc/etc-activation.nix':

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:832:128:
          831|         defs' = concatMap (m:
          832|           map (value: { inherit (m) file; inherit value; }) (addErrorContext "while evaluating definitions from `${m.file}':" (dischargeProperties m.value))
             |                                                                                                                                ^
          833|         ) defs;

       … while calling 'dischargeProperties'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:903:25:
          902|   */
          903|   dischargeProperties = def:
             |                         ^
          904|     if def._type or "" == "merge" then

       … while evaluating a branch condition
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:904:5:
          903|   dischargeProperties = def:
          904|     if def._type or "" == "merge" then
             |     ^
          905|       concatMap dischargeProperties def.contents

       … while evaluating the attribute 'value'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:614:53:
          613|                 (n: value:
          614|                   [{ inherit (module) file; inherit value; }]
             |                                                     ^
          615|                 )

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/nixos/modules/system/etc/etc-activation.nix:18:9:
           17|         "groups"
           18|       ] config.system.build.etcActivationCommands;
             |         ^
           19|     }

       … while calling anonymous lambda
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/attrsets.nix:1570:24:
         1569|     let f = attrPath:
         1570|       zipAttrsWith (n: values:
             |                        ^
         1571|         let here = attrPath ++ [n]; in

       … while calling the 'head' builtin
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/attrsets.nix:1574:11:
         1573|         || pred here (elemAt values 1) (head values) then
         1574|           head values
             |           ^
         1575|         else

       … while calling anonymous lambda
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/types.nix:601:29:
          600|       merge = loc: defs:
          601|         zipAttrsWith (name: defs:
             |                             ^
          602|           let merged = mergeDefinitions (loc ++ [name]) elemType defs;

       … while evaluating the attribute 'optionalValue.value'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:863:5:
          862|
          863|     optionalValue =
             |     ^
          864|       if isDefined then { value = mergedValue; }

       (9 duplicate frames omitted)

       … while evaluating definitions from `/nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/nixos/modules/system/etc/etc.nix':

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:832:128:
          831|         defs' = concatMap (m:
          832|           map (value: { inherit (m) file; inherit value; }) (addErrorContext "while evaluating definitions from `${m.file}':" (dischargeProperties m.value))
             |                                                                                                                                ^
          833|         ) defs;

       … while calling 'dischargeProperties'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:903:25:
          902|   */
          903|   dischargeProperties = def:
             |                         ^
          904|     if def._type or "" == "merge" then

       … while evaluating a branch condition
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:904:5:
          903|   dischargeProperties = def:
          904|     if def._type or "" == "merge" then
             |     ^
          905|       concatMap dischargeProperties def.contents

       … while evaluating the attribute 'value'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/types.nix:607:58:
          606|         # Push down position info.
          607|         (map (def: mapAttrs (n: v: { inherit (def) file; value = v; }) def.value) defs);
             |                                                          ^
          608|       emptyValue = { value = {}; };

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/attrsets.nix:273:39:
          272|         then value
          273|         else { ${elemAt attrPath n} = atDepth (n + 1); };
             |                                       ^
          274|     in atDepth 0;

       … while calling 'atDepth'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/attrsets.nix:270:17:
          269|       len = length attrPath;
          270|       atDepth = n:
             |                 ^
          271|         if n == len

       … while evaluating the attribute 'value'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:614:53:
          613|                 (n: value:
          614|                   [{ inherit (module) file; inherit value; }]
             |                                                     ^
          615|                 )

       … while calling the 'getAttr' builtin
         at <nix/derivation-internal.nix>:44:19:
           43|       value = commonAttrs // {
           44|         outPath = builtins.getAttr outputName strict;
             |                   ^
           45|         drvPath = strict.drvPath;

       … while calling the 'derivationStrict' builtin
         at <nix/derivation-internal.nix>:34:12:
           33|
           34|   strict = derivationStrict drvAttrs;
             |            ^
           35|

       … while evaluating derivation 'etc'
         whose name attribute is located at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/pkgs/stdenv/generic/make-derivation.nix:336:7

       … while evaluating attribute 'buildCommand' of derivation 'etc'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/pkgs/build-support/trivial-builders/default.nix:59:17:
           58|         enableParallelBuilding = true;
           59|         inherit buildCommand name;
             |                 ^
           60|         passAsFile = [ "buildCommand" ]

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/nixos/modules/system/etc/etc.nix:58:11:
           57|         mkdir -p "$out/etc"
           58|         ${lib.concatMapStringsSep "\n" (
             |           ^
           59|           etcEntry:

       … while calling 'concatMapStringsSep'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/strings.nix:232:5:
          231|     f:
          232|     list: concatStringsSep sep (map f list);
             |     ^
          233|

       … while calling the 'concatStringsSep' builtin
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/strings.nix:232:11:
          231|     f:
          232|     list: concatStringsSep sep (map f list);
             |           ^
          233|

       … while calling anonymous lambda
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/nixos/modules/system/etc/etc.nix:59:11:
           58|         ${lib.concatMapStringsSep "\n" (
           59|           etcEntry:
             |           ^
           60|           lib.escapeShellArgs [

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/nixos/modules/system/etc/etc.nix:60:11:
           59|           etcEntry:
           60|           lib.escapeShellArgs [
             |           ^
           61|             "makeEtcEntry"

       … while calling 'concatMapStringsSep'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/strings.nix:232:5:
          231|     f:
          232|     list: concatStringsSep sep (map f list);
             |     ^
          233|

       … while calling the 'concatStringsSep' builtin
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/strings.nix:232:11:
          231|     f:
          232|     list: concatStringsSep sep (map f list);
             |           ^
          233|

       … while calling 'escapeShellArg'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/strings.nix:1056:20:
         1055|   */
         1056|   escapeShellArg = arg:
             |                    ^
         1057|     let

       … while evaluating a branch condition
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/strings.nix:1060:7:
         1059|     in
         1060|       if match "[[:alnum:],._+:@%/-]+" string == null
             |       ^
         1061|       then "'${replaceStrings ["'"] ["'\\''"] string}'"

       … while calling the 'match' builtin
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/strings.nix:1060:10:
         1059|     in
         1060|       if match "[[:alnum:],._+:@%/-]+" string == null
             |          ^
         1061|       then "'${replaceStrings ["'"] ["'\\''"] string}'"

       … while evaluating the second argument passed to builtins.match

       … while calling the 'toString' builtin
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/strings.nix:1058:16:
         1057|     let
         1058|       string = toString arg;
             |                ^
         1059|     in

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/nixos/modules/system/etc/etc.nix:63:16:
           62|             # Force local source paths to be added to the store
           63|             "${etcEntry.source}"
             |                ^
           64|             etcEntry.target

       … while calling anonymous lambda
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/attrsets.nix:1204:18:
         1203|         mapAttrs
         1204|           (name: value:
             |                  ^
         1205|             if isAttrs value && cond value

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/attrsets.nix:1207:18:
         1206|             then recurse (path ++ [ name ]) value
         1207|             else f (path ++ [ name ]) value);
             |                  ^
         1208|     in

       … while calling anonymous lambda
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:254:72:
          253|           # For definitions that have an associated option
          254|           declaredConfig = mapAttrsRecursiveCond (v: ! isOption v) (_: v: v.value) options;
             |                                                                        ^
          255|

       … while evaluating the attribute 'value'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:816:9:
          815|     in warnDeprecation opt //
          816|       { value = addErrorContext "while evaluating the option `${showOption loc}':" value;
             |         ^
          817|         inherit (res.defsFinal') highestPrio;

       … while evaluating the option `environment.etc.dbus-1.source':

       … while evaluating the attribute 'mergedValue'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:851:5:
          850|     # Type-check the remaining definitions, and merge them. Or throw if no definitions.
          851|     mergedValue =
             |     ^
          852|       if isDefined then

       … while evaluating a branch condition
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:853:9:
          852|       if isDefined then
          853|         if all (def: type.check def.value) defsFinal then type.merge loc defsFinal
             |         ^
          854|         else let allInvalid = filter (def: ! type.check def.value) defsFinal;

       … while calling the 'all' builtin
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:853:12:
          852|       if isDefined then
          853|         if all (def: type.check def.value) defsFinal then type.merge loc defsFinal
             |            ^
          854|         else let allInvalid = filter (def: ! type.check def.value) defsFinal;

       … while calling anonymous lambda
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:853:17:
          852|       if isDefined then
          853|         if all (def: type.check def.value) defsFinal then type.merge loc defsFinal
             |                 ^
          854|         else let allInvalid = filter (def: ! type.check def.value) defsFinal;

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:853:22:
          852|       if isDefined then
          853|         if all (def: type.check def.value) defsFinal then type.merge loc defsFinal
             |                      ^
          854|         else let allInvalid = filter (def: ! type.check def.value) defsFinal;

       … while calling 'check'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/types.nix:528:15:
          527|       descriptionClass = "noun";
          528|       check = x: isStringLike x && builtins.substring 0 1 (toString x) == "/";
             |               ^
          529|       merge = mergeEqualOption;

       … in the right operand of the AND (&&) operator
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/types.nix:528:33:
          527|       descriptionClass = "noun";
          528|       check = x: isStringLike x && builtins.substring 0 1 (toString x) == "/";
             |                                 ^
          529|       merge = mergeEqualOption;

       … while calling the 'substring' builtin
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/types.nix:528:36:
          527|       descriptionClass = "noun";
          528|       check = x: isStringLike x && builtins.substring 0 1 (toString x) == "/";
             |                                    ^
          529|       merge = mergeEqualOption;

       … while calling the 'toString' builtin
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/types.nix:528:60:
          527|       descriptionClass = "noun";
          528|       check = x: isStringLike x && builtins.substring 0 1 (toString x) == "/";
             |                                                            ^
          529|       merge = mergeEqualOption;

       … while calling the 'getAttr' builtin
         at <nix/derivation-internal.nix>:44:19:
           43|       value = commonAttrs // {
           44|         outPath = builtins.getAttr outputName strict;
             |                   ^
           45|         drvPath = strict.drvPath;

       … while calling the 'derivationStrict' builtin
         at <nix/derivation-internal.nix>:34:12:
           33|
           34|   strict = derivationStrict drvAttrs;
             |            ^
           35|

       … while evaluating derivation 'dbus-1'
         whose name attribute is located at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/pkgs/stdenv/generic/make-derivation.nix:336:7

       … while evaluating attribute 'serviceDirectories' of derivation 'dbus-1'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/pkgs/development/libraries/dbus/make-dbus-conf.nix:19:13:
           18|   {
           19|     inherit serviceDirectories suidHelper apparmor;
             |             ^
           20|     preferLocalBuild = true;

       … while calling anonymous lambda
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/types.nix:546:14:
          545|       merge = loc: defs:
          546|         map (x: x.value) (filter (x: x ? value) (concatLists (imap1 (n: def:
             |              ^
          547|           imap1 (m: def':

       … while evaluating the attribute 'value'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/modules.nix:864:27:
          863|     optionalValue =
          864|       if isDefined then { value = mergedValue; }
             |                           ^
          865|       else {};

       (10 duplicate frames omitted)

       … while evaluating derivation 'system-path'
         whose name attribute is located at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/pkgs/stdenv/generic/make-derivation.nix:336:7

       … while evaluating attribute 'passAsFile' of derivation 'system-path'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/pkgs/build-support/trivial-builders/default.nix:60:9:
           59|         inherit buildCommand name;
           60|         passAsFile = [ "buildCommand" ]
             |         ^
           61|           ++ (derivationArgs.passAsFile or [ ]);

       … while evaluating the attribute 'passAsFile'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/pkgs/build-support/buildenv/default.nix:107:7:
          106|       # XXX: The size is somewhat arbitrary
          107|       passAsFile = if builtins.stringLength pkgs >= 128 * 1024 then [ "pkgs" ] else [ ];
             |       ^
          108|     }

       … while evaluating a branch condition
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/pkgs/build-support/buildenv/default.nix:107:20:
          106|       # XXX: The size is somewhat arbitrary
          107|       passAsFile = if builtins.stringLength pkgs >= 128 * 1024 then [ "pkgs" ] else [ ];
             |                    ^
          108|     }

       … in the argument of the not operator
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/pkgs/build-support/buildenv/default.nix:107:50:
          106|       # XXX: The size is somewhat arbitrary
          107|       passAsFile = if builtins.stringLength pkgs >= 128 * 1024 then [ "pkgs" ] else [ ];
             |                                                  ^
          108|     }

       … while calling the 'lessThan' builtin
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/pkgs/build-support/buildenv/default.nix:107:50:
          106|       # XXX: The size is somewhat arbitrary
          107|       passAsFile = if builtins.stringLength pkgs >= 128 * 1024 then [ "pkgs" ] else [ ];
             |                                                  ^
          108|     }

       … while calling the 'stringLength' builtin
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/pkgs/build-support/buildenv/default.nix:107:23:
          106|       # XXX: The size is somewhat arbitrary
          107|       passAsFile = if builtins.stringLength pkgs >= 128 * 1024 then [ "pkgs" ] else [ ];
             |                       ^
          108|     }

       … while calling the 'toJSON' builtin
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/pkgs/build-support/buildenv/default.nix:102:14:
          101|         ;
          102|       pkgs = builtins.toJSON chosenOutputs;
             |              ^
          103|       extraPathsFrom = lib.optional includeClosures (writeClosure pathsForClosure);

       … while evaluating list element at index 41

       … while evaluating attribute 'paths'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/pkgs/build-support/buildenv/default.nix:64:7:
           63|     chosenOutputs = map (drv: {
           64|       paths =
             |       ^
           65|         # First add the usual output(s): respect if user has chosen explicitly,

       … while evaluating list element at index 0
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/pkgs/build-support/buildenv/default.nix:64:7:
           63|     chosenOutputs = map (drv: {
           64|       paths =
             |       ^
           65|         # First add the usual output(s): respect if user has chosen explicitly,

       … while calling the 'getAttr' builtin
         at <nix/derivation-internal.nix>:44:19:
           43|       value = commonAttrs // {
           44|         outPath = builtins.getAttr outputName strict;
             |                   ^
           45|         drvPath = strict.drvPath;

       … while calling the 'derivationStrict' builtin
         at <nix/derivation-internal.nix>:34:12:
           33|
           34|   strict = derivationStrict drvAttrs;
             |            ^
           35|

       … while evaluating derivation 'nixos-configuration-reference-manpage'
         whose name attribute is located at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/pkgs/stdenv/generic/make-derivation.nix:336:7

       … while evaluating attribute 'buildCommand' of derivation 'nixos-configuration-reference-manpage'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/pkgs/build-support/trivial-builders/default.nix:59:17:
           58|         enableParallelBuilding = true;
           59|         inherit buildCommand name;
             |                 ^
           60|         passAsFile = [ "buildCommand" ]

       … while calling the 'getAttr' builtin
         at <nix/derivation-internal.nix>:44:19:
           43|       value = commonAttrs // {
           44|         outPath = builtins.getAttr outputName strict;
             |                   ^
           45|         drvPath = strict.drvPath;

       … while calling the 'derivationStrict' builtin
         at <nix/derivation-internal.nix>:34:12:
           33|
           34|   strict = derivationStrict drvAttrs;
             |            ^
           35|

       … while evaluating derivation 'options.json'
         whose name attribute is located at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/pkgs/stdenv/generic/make-derivation.nix:336:7

       … while evaluating attribute 'options' of derivation 'options.json'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/nixos/lib/make-options-doc/default.nix:214:9:
          213|         ];
          214|         options = builtins.toFile "options.json" (
             |         ^
          215|           builtins.unsafeDiscardStringContext (builtins.toJSON optionsNix)

       … while calling the 'toFile' builtin
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/nixos/lib/make-options-doc/default.nix:214:19:
          213|         ];
          214|         options = builtins.toFile "options.json" (
             |                   ^
          215|           builtins.unsafeDiscardStringContext (builtins.toJSON optionsNix)

       … while evaluating the second argument passed to builtins.toFile

       … while calling the 'unsafeDiscardStringContext' builtin
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/nixos/lib/make-options-doc/default.nix:215:11:
          214|         options = builtins.toFile "options.json" (
          215|           builtins.unsafeDiscardStringContext (builtins.toJSON optionsNix)
             |           ^
          216|         );

       … while calling the 'toJSON' builtin
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/nixos/lib/make-options-doc/default.nix:215:48:
          214|         options = builtins.toFile "options.json" (
          215|           builtins.unsafeDiscardStringContext (builtins.toJSON optionsNix)
             |                                                ^
          216|         );

       … while evaluating attribute '"networking.stevenBlackHosts.enableIPv6"'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/nixos/lib/make-options-doc/default.nix:168:7:
          167|       name = o.name;
          168|       value = removeAttrs o [
             |       ^
          169|         "name"

       … while evaluating attribute 'default'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/options.nix:344:11:
          343|         // optionalAttrs (opt ? defaultText || opt ? default) {
          344|           default =
             |           ^
          345|             builtins.addErrorContext "while evaluating the ${if opt?defaultText then "defaultText" else "default value"} of option `${name}`" (

       … while evaluating the default value of option `networking.stevenBlackHosts.enableIPv6`

       … from call site
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/options.nix:346:15:
          345|             builtins.addErrorContext "while evaluating the ${if opt?defaultText then "defaultText" else "default value"} of option `${name}`" (
          346|               renderOptionValue (opt.defaultText or opt.default)
             |               ^
          347|             );

       … while calling 'renderOptionValue'
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/options.nix:383:23:
          382|   */
          383|   renderOptionValue = v:
             |                       ^
          384|     if v ? _type && v ? text then v

       … while evaluating a branch condition
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/options.nix:384:5:
          383|   renderOptionValue = v:
          384|     if v ? _type && v ? text then v
             |     ^
          385|     else literalExpression (lib.generators.toPretty {

       … in the left operand of the AND (&&) operator
         at /nix/store/k5m013s96104sv1fl3awxn83l57j9dpm-source/lib/options.nix:384:18:
          383|   renderOptionValue = v:
          384|     if v ? _type && v ? text then v
             |                  ^
          385|     else literalExpression (lib.generators.toPretty {

       … while evaluating the attribute 'default'
         at /nix/store/28kb6ki1q3a98aqwmp09g8yksb5cz7mn-source/flake.nix:26:15:
           25|             enableIPv6 = mkEnableOption "IPv6 rules" // {
           26|               default = config.networking.enableIPv6;
             |               ^
           27|             };

       error: attribute 'enableIPv6' missing
       at /nix/store/28kb6ki1q3a98aqwmp09g8yksb5cz7mn-source/flake.nix:26:25:
           25|             enableIPv6 = mkEnableOption "IPv6 rules" // {
           26|               default = config.networking.enableIPv6;
             |                         ^
           27|             };

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