best practices: use builtins.path for local source

pkgs/download/default.nix

@@ -4,10 +4,16 @@
   ffmpeg,
   ...
 }:
-python3Packages.buildPythonApplication {
+let
   pname = "download";
   version = "2.5";
-  src = ../../scripts/download/.;
+in
+python3Packages.buildPythonApplication {
+  inherit pname version;
+  src = {
+    path = ../../scripts/download/.;
+    name = "${pname}-${version}";
+  };
   build-system = [ python3Packages.setuptools ];
   dependencies = builtins.attrValues {
     inherit (python3Packages)

pkgs/vdhcoapp/default.nix

@@ -41,7 +41,10 @@ buildNpmPackage (
 
     patches = [
       (substituteAll {
-        src = ./code.patch;
+        src = builtins.path {
+          path = ./code.patch;
+          name = "${src.name}-patch";
+        };
         inherit ffmpeg;
         filepicker = lib.getExe filepicker;
       })