diff --git a/configuration.nix b/configuration.nix
index d35b10b..5b80201 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -16,7 +16,6 @@
     };
   };
   nix = {
-    package = pkgs.nixFlakes;
     extraOptions = ''
       experimental-features = nix-command flakes
     '';
diff --git a/flake.lock b/flake.lock
index 0df3710..fc24e1f 100644
--- a/flake.lock
+++ b/flake.lock
@@ -74,11 +74,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1703992652,
-        "narHash": "sha256-C0o8AUyu8xYgJ36kOxJfXIroy9if/G6aJbNOpA5W0+M=",
+        "lastModified": 1704874635,
+        "narHash": "sha256-YWuCrtsty5vVZvu+7BchAxmcYzTMfolSPP5io8+WYCg=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "32f63574c85fbc80e4ba1fbb932cde9619bad25e",
+        "rev": "3dc440faeee9e889fe2d1b4d25ad0f430d449356",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 3796cc9..6b5a078 100644
--- a/flake.nix
+++ b/flake.nix
@@ -36,6 +36,8 @@
             # Pin nixpkgs to the flake input, so that nixpkgs#hello comes from the
             # flake inputs.nixpkgs.url.
             ({ ... }: { nix.registry.nixpkgs.flake = nixpkgs; })
+            # Use Nix 2.19 instead of 2.18.1.
+            ({ ... }: { nix.package = nixpkgs.legacyPackages.x86_64-linux.nixVersions.nix_2_19; })
             # Apply the rest of the config.
             ./configuration.nix
           ];