diff --git a/lib/licenses.nix b/lib/licenses.nix
index 333d32ded..88606f968 100644
--- a/lib/licenses.nix
+++ b/lib/licenses.nix
@@ -721,10 +721,9 @@ lib.mapAttrs mkLicense ({
     fullName = "ISC License";
   };
 
-  # Proprietary binaries; free to redistribute without modification.
   databricks = {
-    fullName = "Databricks Proprietary License";
-    url = "https://pypi.org/project/databricks-connect";
+    fullName = "Databricks License";
+    url = "https://www.databricks.com/legal/db-license";
     free = false;
   };
 
diff --git a/lib/modules.nix b/lib/modules.nix
index ef0be5b27..381480a1a 100644
--- a/lib/modules.nix
+++ b/lib/modules.nix
@@ -861,7 +861,7 @@ let
       else
         # (nixos-option detects this specific error message and gives it special
         # handling.  If changed here, please change it there too.)
-        throw "The option `${showOption loc}' is used but not defined.";
+        throw "The option `${showOption loc}' was accessed but has no value defined. Try setting the option.";
 
     isDefined = defsFinal != [];
 
diff --git a/lib/strings.nix b/lib/strings.nix
index 54a5b9c67..ffde541c6 100644
--- a/lib/strings.nix
+++ b/lib/strings.nix
@@ -408,7 +408,6 @@ rec {
       start ? false,
       end ? false,
     }:
-    s:
     let
       # Define our own whitespace character class instead of using
       # `[:space:]`, which is not well-defined.
@@ -425,12 +424,14 @@ rec {
           "(.*[^${chars}])[${chars}]*"
         else
           "(.*)";
-
+    in
+    s:
+    let
       # If the string was empty or entirely whitespace,
       # then the regex may not match and `res` will be `null`.
       res = match regex s;
     in
-      optionalString (res != null) (head res);
+    optionalString (res != null) (head res);
 
   /**
     Construct a Unix-style, colon-separated search path consisting of
diff --git a/lib/systems/default.nix b/lib/systems/default.nix
index cee09791b..955bfa73e 100644
--- a/lib/systems/default.nix
+++ b/lib/systems/default.nix
@@ -376,6 +376,7 @@ let
               "armv7l" = "armv7";
               "armv6l" = "arm";
               "armv5tel" = "armv5te";
+              "riscv32" = "riscv32gc";
               "riscv64" = "riscv64gc";
             }.${cpu.name} or cpu.name;
             vendor_ = final.rust.platform.vendor;
diff --git a/lib/tests/modules.sh b/lib/tests/modules.sh
index 09547b2e0..a14fe8cb3 100755
--- a/lib/tests/modules.sh
+++ b/lib/tests/modules.sh
@@ -312,7 +312,7 @@ checkConfigOutput '^".*Hello.*"$' options.namedPackage.description ./declare-mkP
 checkConfigOutput '^"hello"$' config.pathPackage.pname ./declare-mkPackageOption.nix
 checkConfigOutput '^"pkgs\.hello\.override \{ stdenv = pkgs\.clangStdenv; \}"$' options.packageWithExample.example.text ./declare-mkPackageOption.nix
 checkConfigOutput '^".*Example extra description\..*"$' options.packageWithExtraDescription.description ./declare-mkPackageOption.nix
-checkConfigError 'The option .undefinedPackage. is used but not defined' config.undefinedPackage ./declare-mkPackageOption.nix
+checkConfigError 'The option .undefinedPackage. was accessed but has no value defined. Try setting the option.' config.undefinedPackage ./declare-mkPackageOption.nix
 checkConfigOutput '^null$' config.nullablePackage ./declare-mkPackageOption.nix
 checkConfigOutput '^"null or package"$' options.nullablePackageWithDefault.type.description ./declare-mkPackageOption.nix
 checkConfigOutput '^"myPkgs\.hello"$' options.packageWithPkgsText.defaultText.text ./declare-mkPackageOption.nix
@@ -410,7 +410,7 @@ checkConfigOutput '^null$' config.foo ./freeform-attrsOf.nix ./freeform-str-dep-
 checkConfigOutput '^"24"$' config.foo ./freeform-attrsOf.nix ./freeform-str-dep-unstr.nix ./define-value-string.nix
 # Check whether an freeform-typed value can depend on a declared option, this can only work with lazyAttrsOf
 checkConfigError 'infinite recursion encountered' config.foo ./freeform-attrsOf.nix ./freeform-unstr-dep-str.nix
-checkConfigError 'The option .* is used but not defined' config.foo ./freeform-lazyAttrsOf.nix ./freeform-unstr-dep-str.nix
+checkConfigError 'The option .* was accessed but has no value defined. Try setting the option.' config.foo ./freeform-lazyAttrsOf.nix ./freeform-unstr-dep-str.nix
 checkConfigOutput '^"24"$' config.foo ./freeform-lazyAttrsOf.nix ./freeform-unstr-dep-str.nix ./define-value-string.nix
 # submodules in freeformTypes should have their locations annotated
 checkConfigOutput '/freeform-submodules.nix"$' config.fooDeclarations.0 ./freeform-submodules.nix
@@ -469,8 +469,8 @@ checkConfigOutput "{}" config.attrs.a ./emptyValues.nix
 checkConfigOutput "null" config.null.a ./emptyValues.nix
 checkConfigOutput "{}" config.submodule.a ./emptyValues.nix
 # These types don't have empty values
-checkConfigError 'The option .int.a. is used but not defined' config.int.a ./emptyValues.nix
-checkConfigError 'The option .nonEmptyList.a. is used but not defined' config.nonEmptyList.a ./emptyValues.nix
+checkConfigError 'The option .int.a. was accessed but has no value defined. Try setting the option.' config.int.a ./emptyValues.nix
+checkConfigError 'The option .nonEmptyList.a. was accessed but has no value defined. Try setting the option.' config.nonEmptyList.a ./emptyValues.nix
 
 # types.unique
 #   requires a single definition