anchor.diff:      rpm dpkg cdrkit]));
   
     postInstall = ''
  -    for i in $out/bin/*; do
  +    for i in "$out/bin/"*; do
           wrapProgram $i \
               --prefix PERL5LIB ':' $out/libexec/hydra/lib:$PERL5LIB \
               --prefix PATH ':' $out/bin:$hydraPath \
  
positive.code:             --set HYDRA_HOME $out/libexec/hydra \
              --set NIX_RELEASE ${nix.name}
      done
    ''; # */
  
    meta = {
      platforms = stdenv.lib.platforms.linux;
    };  
  }
  
  
negative.code: 
  stdenv.mkDerivation rec {
    name = "hydra-${version}";
    version = "0.1pre26202";
    src = fetchurl {
      url = http://hydra.nixos.org/build/956221/download/2/hydra-0.1pre26202.tar.gz;
      sha256 = "0v727al406akn9n9ys5kl77kagr5l8yq9zi4nnn9nrcii8pavb99";
    };
  
    configureFlags = "--with-nix=${nix}";
  