anchor.diff:        hardware.
       '';
       homepage = "https://haproxy.org";
  -    license = licenses.gpl2;
  +    changelog = "https://www.haproxy.org/download/${lib.versions.majorMinor version}/src/CHANGELOG";
  +    license = with licenses; [ gpl2Plus lgpl21Only ];
       maintainers = with maintainers; [ fuzzy-id ];
       platforms = with platforms; linux ++ darwin;
     };
  
positive.code: 
  stdenv.mkDerivation rec {
    pname = "haproxy";
    version = "2.5.3";
  
    src = fetchurl {
      url = "https://www.haproxy.org/download/${lib.versions.majorMinor version}/src/${pname}-${version}.tar.gz";
      sha256 = "sha256-1vo8ZvcH/5O1vSfOaecKiWTXtweFSLUYaNR9ffOUP+Q=";
    };
  
    buildInputs = [ openssl zlib ]
  
negative.code: 
    # TODO: make it work on bsd as well
    makeFlags = [
      "PREFIX=${placeholder "out"}"
      ("TARGET=" + (if stdenv.isSunOS  then "solaris"
               else if stdenv.isLinux  then "linux-glibc"
               else if stdenv.isDarwin then "osx"
  