anchor.diff:    # "git describe" when _not_ on an annotated tag(!): MAJOR.MINOR-REV-HASH.
   
     # Version to build.
  -  tag = "4.2";
  +  tag = "4.3";
   
   in
   
  
positive.code:   src = fetchFromGitHub {
      owner = "Ardour";
      repo = "ardour";
      rev = "fe672c827cb2c08c94b1fa7e527d884c522a1af7";
      sha256 = "12yfy9l5mnl96ix4s2qicp3m2zscli1a4bd50nk9v035pgf77s3f";
    };
  
    buildInputs =
  
negative.code:     homepage = http://ardour.org/;
      license = licenses.gpl2;
      platforms = platforms.linux;
      maintainers = [ maintainers.goibhniu maintainers.fps ];
    };
  }
  