arandr: refactor derivation

pkgs/tools/X11/arandr/default.nix

···
-{ lib, fetchurl, python3Packages
-, gobject-introspection, gsettings-desktop-schemas, gtk3
-, wrapGAppsHook, xrandr
+{ lib
+, fetchurl
+, python3Packages
+, gobject-introspection
+, gsettings-desktop-schemas
+, gtk3
+, wrapGAppsHook
+, xrandr
 }:
 
 let
   inherit (python3Packages) buildPythonApplication docutils pygobject3;
+in
+buildPythonApplication rec {
   pname = "arandr";
   version = "0.1.10";
-  name = "${pname}-${version}";
-in buildPythonApplication rec {
-  inherit pname version;
 
   src = fetchurl {
-    url = "https://christian.amsuess.com/tools/arandr/files/${name}.tar.gz";
+    url = "https://christian.amsuess.com/tools/arandr/files/${pname}-${version}.tar.gz";
     sha256 = "135q0llvm077jil2fr92ssw3p095m4r8jfj0lc5rr3m71n4srj6v";
   };
 
-  patchPhase = ''
+  preBuild = ''
     rm -rf data/po/*
   '';