anchor.diff: -{ stdenv, fetchurl, makeWrapper, xorg, imlib2, libjpeg, libpng
  +{ stdenv, fetchurl, makeWrapper
  +, xorg, imlib2, libjpeg, libpng
   , curl, libexif, perlPackages }:
   
  +with stdenv.lib;
  +
   stdenv.mkDerivation rec {
  -  name = "feh-2.18.1";
  +  name = "feh-${version}";
  +  version = "2.18.2";
   
     src = fetchurl {
       url = "http://feh.finalrewind.org/${name}.tar.bz2";
  -    sha256 = "1ck55rhh5ax1d9k9gy2crvyjwffh6028f4kxaisd8ymgbql40f2c";
  +    sha256 = "09f5rfzls4h5jcrp7ylwbiljp5qzc2nbw9p2csv0pnlaixj69gil";
     };
   
     outputs = [ "out" "doc" ];
   
     nativeBuildInputs = [ makeWrapper xorg.libXt ]
  -    ++ stdenv.lib.optionals doCheck [ perlPackages.TestCommand perlPackages.TestHarness ];
  +    ++ optionals doCheck [ perlPackages.TestCommand perlPackages.TestHarness ];
   
     buildInputs = [ xorg.libX11 xorg.libXinerama imlib2 libjpeg libpng curl libexif ];
   
  
positive.code:   meta = {
      description = "A light-weight image viewer";
      homepage = https://derf.homelinux.org/projects/feh/;
      license = stdenv.lib.licenses.mit;
      maintainers = with stdenv.lib.maintainers; [viric];
      platforms = with stdenv.lib.platforms; unix;
    };
  }
  
negative.code:     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' 
      '';
  
    checkPhase = ''
      PERL5LIB="${perlPackages.TestCommand}/lib/perl5/site_perl" make test
  