anchor.diff:  
     meta = with lib; {
       homepage = "https://github.com/keesL/metar";
  -    license = licenses.gpl2;
  -    maintainers = [ maintainers.zalakain ];
       description = "Downloads weather reports and optionally decodes them";
       longDescription = ''
         METAR reports are meteorogical weather reports for aviation. Metar is a small
  
positive.code: { lib, stdenv, fetchgit, curl }:
  
  stdenv.mkDerivation {
    pname = "metar";
    version = "20161013.1";
  
    src = fetchgit {
      url = "https://github.com/keesL/metar.git";
      rev = "20e9ca69faea330f6c2493b6829131c24cb55147";
      sha256 = "1fgrlnpasqf1ihh9y6zy6mzzybqx0lxvh7gmv03rjdb55dr42dxj";
    };
  
negative.code:       more work in the area of clouds need to be done, as support for Cumulus or
        Cumulunimbus is not yet decoded.
      '';
      license = licenses.gpl2Plus;
      maintainers = with maintainers; [ zalakain ];
    };
  }
  