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