diff --git a/flake.nix b/flake.nix
index e9e17bc..32749a3 100644
--- a/flake.nix
+++ b/flake.nix
@@ -23,6 +23,13 @@
         in
           (type == "regular") && (builtins.elem bname names);
 
+        noFlakeSrc = src:
+          pkgs.lib.cleanSourceWith {
+            inherit src;
+            filter = path: type:
+              !(baseNameOf path == "flake.nix" || baseNameOf path == "flake.lock" || baseNameOf path == "mime.types");
+          };
+
         mkNpSrc = src:
           pkgs.lib.cleanSourceWith {
             inherit src;