anchor.diff:  { fetchFromGitHub
   , stdenv
   , gnome3
  +, gnome-icon-theme
   , hicolor-icon-theme
   , gtk3
   }:
  
positive.code:     gtk3
    ];
  
    postFixup =  ''
      gtk-update-icon-cache $out/share/icons/*
    '';
  
    dontDropIconThemeCache = true;
  
    installPhase = ''
      mkdir -p $out
      mv usr/share $out
    '';
  
    meta = with stdenv.lib; {
  
negative.code:     sha256 = "1c2a79ylk363i982czwwqcwc7cw6dyzlqphcypqm6nll7xlafq8s";
    };
  
    propagatedBuildInputs = [
      gnome3.adwaita-icon-theme
      gnome-icon-theme
      hicolor-icon-theme
    ];
  
  