diff --git a/flake.nix b/flake.nix
index 7b24acf..4be5830 100644
--- a/flake.nix
+++ b/flake.nix
@@ -154,14 +154,17 @@
                     );
 
                   config.environment.etc."nix/extra-builtins.nix".source =
-                    lib.mkIf config.dragnpkgs.possiblyCommitCrimes
-                    ''
+                    lib.mkIf config.dragnpkgs.possiblyCommitCrimes (
+                    let
+                      possiblyCommitCrimes =
+                        lib.boolToString config.dragnpkgs.possiblyCommitCrimes;
+                    in ''
                       { ... }: {
                         dragnpkgs = {
-                          possiblyCommitCrimes = ${config.dragnpkgs.possiblyCommitCrimes};
+                          possiblyCommitCrimes = ${possiblyCommitCrimes};
                         };
                       }
-                    '';
+                    '');
                 })
 
                 (import ./module.nix)