diff --git a/flake.nix b/flake.nix
index 558b79f..ce30f8a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -153,7 +153,7 @@
                       lib.mkForce "/etc/nix/extra-builtins.nix"
                     );
 
-                  config.environment.etc."nix/extra-builtins.nix".source =
+                  config.environment.etc."nix/extra-builtins.nix".text =
                     lib.mkIf config.dragnpkgs.possiblyCommitCrimes (
                     let
                       possiblyCommitCrimes =