anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "leiningen";
  -  version = "2.8.3";
  +  version = "2.9.0";
     name = "${pname}-${version}";
   
     src = fetchurl {
       url = "https://raw.github.com/technomancy/leiningen/${version}/bin/lein-pkg";
  -    sha256 = "1jbrm4vdvwskbi9sxvn6i7h2ih9c3nfld63nx58nblghvlcb9vwx";
  +    sha256 = "18wwcc956w1ii6zf8zjndgvmc614s18nxz3dary2iigbfq4y0asc";
     };
   
     jarsrc = fetchurl {
       # NOTE: This is actually a .jar, Github has issues
       url = "https://github.com/technomancy/leiningen/releases/download/${version}/${name}-standalone.zip";
  -    sha256 = "07kb7d84llp24l959gndnfmislnnvgpsxghmgfdy8chy7g4sy2kz";
  +    sha256 = "07pw852w57w3lj3fddlxfzjsln90q52dwxvxpz9qbprw8p2xfrim";
     };
   
     JARNAME = "${name}-standalone.jar";
  
positive.code: 
    installPhase = ''
      mkdir -p $out/bin $out/share
  
      cp -v $src $out/bin/lein
      cp -v $jarsrc $out/share/$JARNAME
    '';
  
negative.code:   fixupPhase = ''
      chmod +x $out/bin/lein
      patchShebangs $out/bin/lein
      substituteInPlace $out/bin/lein \
        --replace 'LEIN_JAR=/usr/share/java/leiningen-$LEIN_VERSION-standalone.jar' "LEIN_JAR=$out/share/$JARNAME"
      wrapProgram $out/bin/lein \
        --prefix PATH ":" "${stdenv.lib.makeBinPath [ rlwrap coreutils ]}" \
        --set LEIN_GPG ${gnupg1compat}/bin/gpg \
  