anchor.diff:        transmission exists.
       '';
       homepage = "http://www.nncpgo.org/";
  -    license = licenses.gpl3;
  +    license = licenses.gpl3Only;
       platforms = platforms.all;
       maintainers = [ maintainers.woffs ];
     };
  
positive.code: 
  stdenv.mkDerivation rec {
    pname = "nncp";
    version = "5.3.3";
  
    src = fetchurl {
      url = "http://www.nncpgo.org/download/${pname}-${version}.tar.xz";
      sha256 = "1l35ndzrvpfim29jn1p0bwmc8w892z44nsrdnay28k229r9dhz3h";
    };
  
    nativeBuildInputs = [ go ];
  
    preConfigure = ''
      export GOCACHE=$PWD/.cache
    '';
  
    makeFlags = [
      "PREFIX=${placeholder "out"}"
      "CFGPATH=/etc/nncp.hjson"
      "SENDMAIL=/run/wrappers/bin/sendmail"
    ];
  
    passthru.updateScript = genericUpdater {
      inherit pname version;
  
negative.code: { lib, stdenv
  , go
  , fetchurl
  , redo-apenwarr
  , curl
  , perl
  , genericUpdater
  