gimp: Fix interpreter path

GIMP uses python interpreter specified in pygimp.interp file for running Python plug-ins,
so any Python related wrapping is useless. It will pick up and use the python from build PATH.

Let’s use a python environment containing pygtk, which is needed by many plug-ins.

Closes: https://github.com/NixOS/nixpkgs/issues/87883

pkgs/applications/graphics/gimp/default.nix

@@ -28,9 +28,10 @@
 , ghostscript
 , aalib
 , shared-mime-info
-, python2Packages
+, python2
 , libexif
 , gettext
+, makeWrapper
 , xorg
 , glib-networking
 , libmypaint
@@ -47,7 +48,7 @@
 }:
 
 let
-  inherit (python2Packages) pygtk wrapPython python;
+  python = python2.withPackages (pp: [ pp.pygtk ]);
 in stdenv.mkDerivation rec {
   pname = "gimp";
   version = "2.10.20";
@@ -63,7 +64,7 @@ in stdenv.mkDerivation rec {
     pkgconfig
     intltool
     gettext
-    wrapPython
+    makeWrapper
   ];
 
   buildInputs = [
@@ -97,7 +98,6 @@ in stdenv.mkDerivation rec {
     libwebp
     libheif
     python
-    pygtk
     libexif
     xorg.libXpm
     glib-networking
@@ -116,8 +116,6 @@ in stdenv.mkDerivation rec {
     gegl
   ];
 
-  pythonPath = [ pygtk ];
-
   # Check if librsvg was built with --disable-pixbuf-loader.
   PKG_CONFIG_GDK_PIXBUF_2_0_GDK_PIXBUF_MODULEDIR = "${librsvg}/${gdk-pixbuf.moduleDir}";
 
@@ -136,9 +134,7 @@ in stdenv.mkDerivation rec {
   ];
 
   postFixup = ''
-    wrapPythonProgramsIn $out/lib/gimp/${passthru.majorVersion}/plug-ins/
     wrapProgram $out/bin/gimp-${lib.versions.majorMinor version} \
-      --prefix PYTHONPATH : "$PYTHONPATH" \
       --set GDK_PIXBUF_MODULE_FILE "$GDK_PIXBUF_MODULE_FILE"
   '';