anchor.diff:    };
   
     buildInputs = [ geoclue2 ]
  -    ++ stdenv.lib.optionals guiSupport [ hicolor_icon_theme gtk3 python
  -      pygobject3 pyxdg ]
  +    ++ stdenv.lib.optionals guiSupport [ hicolor_icon_theme librsvg gtk3
  +      python pygobject3 pyxdg ]
       ++ stdenv.lib.optionals drmSupport [ libdrm ]
       ++ stdenv.lib.optionals randrSupport [ libxcb ]
       ++ stdenv.lib.optionals vidModeSupport [ libX11 libXxf86vm ];
  
positive.code:     substituteInPlace src/redshift-gtk/redshift-gtk \
        --replace "/usr/bin/env python3" "${python}/bin/${python.executable}"
    '';
  
    postInstall = stdenv.lib.optionalString guiSupport ''
      wrapProgram "$out/bin/redshift-gtk" \
        --prefix PYTHONPATH : "$PYTHONPATH" \
        --prefix GI_TYPELIB_PATH : "$GI_TYPELIB_PATH" \
        --prefix XDG_DATA_DIRS : "$out/share:${hicolor_icon_theme}/share"
  
negative.code: { fetchurl, stdenv, gettext, intltool, makeWrapper, pkgconfig
  , geoclue2
  , guiSupport ? true, hicolor_icon_theme, librsvg, gtk3, python, pygobject3, pyxdg
  , drmSupport ? true, libdrm
  , randrSupport ? true, libxcb
  , vidModeSupport ? true, libX11, libXxf86vm
  