python3Packages.skytemple-files: fix non-working patch

pkgs/development/python-modules/skytemple-files/default.nix

@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchFromGitHub, appdirs, explorerscript, ndspy, pillow, setuptools, skytemple-rust, tilequant }:
+{ lib, buildPythonPackage, fetchFromGitHub, appdirs, explorerscript, ndspy, pillow, setuptools, skytemple-rust, tilequant, armips, fetchpatch }:
 
 buildPythonPackage rec {
   pname = "skytemple-files";
@@ -8,9 +8,26 @@ buildPythonPackage rec {
     owner = "SkyTemple";
     repo = pname;
     rev = version;
-    sha256 = "1vklg4kcj3kb9ryrzrcmywn131b2bp3vy94cd4x4y4s7hkhgwg74";
+    sha256 = "sha256-/S0otBujwO/IMiLKgA2o8wlD6xk1/DpwOAfemojV9NU=";
+    fetchSubmodules = true;
   };
 
+  patches = [
+    # fix patching https://github.com/SkyTemple/skytemple-files/pull/128
+    # merged, remove for next update
+    (fetchpatch {
+      url = "http://github.com/SkyTemple/skytemple-files/commit/71dd71e6abb7435405e30225e8a37592b990d692.patch";
+      sha256 = "sha256-CSBaT+LVP9J0C1FlUCduTJroq9z2EAJG6lruvlHlQLI=";
+    })
+  ];
+
+  postPatch = ''
+    substituteInPlace skytemple_files/patch/arm_patcher.py \
+      --replace "exec_name = os.getenv('SKYTEMPLE_ARMIPS_EXEC', f'{prefix}armips')" "exec_name = \"${armips}/bin/armips\""
+  '';
+
+  buildInputs = [ armips ];
+
   propagatedBuildInputs = [ appdirs explorerscript ndspy pillow setuptools skytemple-rust tilequant ];
 
   doCheck = false; # requires Pokémon Mystery Dungeon ROM
@@ -20,6 +37,6 @@ buildPythonPackage rec {
     homepage = "https://github.com/SkyTemple/skytemple-files";
     description = "Python library to edit the ROM of Pokémon Mystery Dungeon Explorers of Sky";
     license = licenses.gpl3Plus;
-    maintainers = with maintainers; [ xfix ];
+    maintainers = with maintainers; [ xfix marius851000 ];
   };
 }