flake: fix build

Author: MarcelCoding

flake.nix

@@ -264,7 +264,10 @@
                     pkgs = pkgs.writeText "pkgs.nix" /* nix */ ''
                       (import ${nixpkgs}) {
                         system = "x86_64-linux";
-                        config.allowBroken = true;
+                        config = {
+                          allowBroken = true;
+                          allowSrcEvalForDrvMeta = true;
+                        };
                       }
                     '';
                   };