anchor.diff:      description = "Creates djvu files from PDF files";
       homepage = http://0x2a.at/s/projects/djvu2pdf;
       license = stdenv.lib.licenses.gpl2;
  +    platforms = stdenv.lib.platforms.all;
       inherit version;
     };
   }
  
positive.code:     sha256 = "0v2ax30m7j1yi4m02nzn9rc4sn4vzqh5vywdh96r64j4pwvn5s5g";
    };
  
    buildInputs = [ pkgconfig ];
    propagatedUserEnvPkgs = [ djvulibre ghostscript ];
  
    installPhase = ''
      mkdir -p $out/bin
      cp -p djvu2pdf $out/bin
      mkdir -p $out/man/man1
      cp -p djvu2pdf.1.gz $out/man/man1
    '';
  
negative.code: { stdenv, makeWrapper, fetchurl, djvulibre, ghostscript, which }:
  
  stdenv.mkDerivation rec {
    version = "0.9.2";
  