anchor.diff:      makeFlags="PREFIX=$out exif=1"
     '';
   
  +  libPath = makeLibraryPath ([ imlib2 curl xorg.libXinerama libjpeg libpng libexif xorg.libX11 ]);
  +
     postInstall = ''
       wrapProgram "$out/bin/feh" --prefix PATH : "${libjpeg.bin}/bin" \
  -                               --add-flags '--theme=feh'
  -  '';
  +                               --add-flags '--theme=feh' 
  +    '';
   
     checkPhase = ''
       PERL5LIB="${perlPackages.TestCommand}/lib/perl5/site_perl" make test
  
positive.code: { stdenv, fetchurl, makeWrapper, xorg, imlib2, libjpeg, libpng
  , curl, libexif, perlPackages }:
  
  stdenv.mkDerivation rec {
    name = "feh-2.18.1";
  
    src = fetchurl {
      url = "http://feh.finalrewind.org/${name}.tar.bz2";
      sha256 = "1ck55rhh5ax1d9k9gy2crvyjwffh6028f4kxaisd8ymgbql40f2c";
    };
  
    outputs = [ "out" "doc" ];
  
    nativeBuildInputs = [ makeWrapper xorg.libXt ]
      ++ stdenv.lib.optionals doCheck [ perlPackages.TestCommand perlPackages.TestHarness ];
  
    buildInputs = [ xorg.libX11 xorg.libXinerama imlib2 libjpeg libpng curl libexif ];
  
  
negative.code:   meta = {
      description = "A light-weight image viewer";
      homepage = https://derf.homelinux.org/projects/feh/;
      license = licenses.mit;
      maintainers = [ maintainers.viric ];
      platforms = platforms.unix;
    };
  }
  