Revert flake-schemas for now

packaging/dependencies.nix

@@ -152,16 +152,5 @@ scope: {
 
   inherit resolvePath filesetToSource;
 
-  mkMesonDerivation = f: let
-    exts = [
-      miscGoodPractice
-      bsdNoLinkAsNeeded
-      localSourceLayer
-    ];
-  in stdenv.mkDerivation
-   (lib.extends
-     (lib.foldr lib.composeExtensions (_: _: {}) exts)
-     f);
-
-  inherit (inputs) flake-schemas;
+  mkMesonDerivation = f: stdenv.mkDerivation (lib.extends localSourceLayer f);
 }

packaging/hydra.nix

@@ -28,8 +28,6 @@ let
       test-daemon = daemon;
 
       doBuild = false;
-
-      inherit (inputs) flake-schemas;
     };
 
   # Technically we could just return `pkgs.nixComponents`, but for Hydra it's