anchor.diff: -{ stdenv, python36Packages, fetchFromGitHub, pywal, feh, libxslt, imagemagick,
  +{ stdenv, python3Packages, fetchFromGitHub, feh, libxslt,
     gobject-introspection, gtk3, wrapGAppsHook, gnome3 }:
   
  -python36Packages.buildPythonApplication rec {
  +python3Packages.buildPythonApplication rec {
     pname = "wpgtk";
     version = "5.7.4";
   
  
positive.code:     libxslt
    ];
  
    # The $HOME variable must be set to build the package. A "permission denied" error will occur otherwise
    preBuild = ''
        export HOME=$(pwd)
    '';
  
    meta = with stdenv.lib; {
      description = "Template based wallpaper/colorscheme generator and manager";
  
negative.code:     sha256 = "0c0kmc18lbr7nk3hh44hai9z06lfsgwxnjdv02hpjwrxg40zh726";
    };
  
    buildInputs = [
      wrapGAppsHook
      gtk3
  