anchor.diff:    postPatch = ''
       substituteInPlace bin/lfc \
         --replace 'base=`dirname $(dirname ''${abs_path})`' "base='$out'" \
  -      --replace "run_lfc_with_args" "${jdk11_headless}/bin/java -jar $out/lib/jars/org.lflang.lfc-${version}-SNAPSHOT-all.jar"
  +      --replace "run_lfc_with_args" "${jdk11_headless}/bin/java -jar $out/lib/jars/org.lflang.lfc-0.1.0-SNAPSHOT-all.jar"
     '';
   
     installPhase = ''
  
positive.code: { lib, pkgs, stdenv, jdk11_headless }:
  stdenv.mkDerivation {
    name = "lfc";
    version = "0.1.0";
  
    src = fetchGit {
      url = "https://github.com/revol-xut/lingua-franca-nix-releases.git";
      rev = "11c6d5297cd63bf0b365a68c5ca31ec80083bd05";
      ref = "master";
    };
  
    buildInputs = [ jdk11_headless ];
  
negative.code:     '';
      homepage = "https://github.com/lf-lang/lingua-franca";
      license = licenses.bsd2;
      platforms = platforms.linux;
      maintainers = with maintainers; [ revol-xut ];
    };
  }
  