anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "sbt-extras";
  -  rev = "dc4f350f112580fcdf5f6fa7e8d5d2116475f84a";
  -  version = "2021-03-01";
  +  rev = "2c582cdbb37dd487bf2140010ddd2e20f3c1394e";
  +  version = "2021-03-03";
   
     src = fetchFromGitHub {
       owner = "paulp";
       repo = "sbt-extras";
       inherit rev;
  -    sha256 = "00qlmxnxmsjs5z03sd46j9spcz1jjkabip4z6f6r43pahjqyd0dk";
  +    sha256 = "1j4j46gzw05bis7akvzfdj36xdwxcabq66wyf917z8vsy31vvajp";
     };
   
     dontBuild = true;
  
positive.code:   nativeBuildInputs = [ makeWrapper ];
  
    installPhase = ''
      mkdir -p $out/bin
  
      substituteInPlace bin/sbt --replace 'declare java_cmd="java"' 'declare java_cmd="${jdk}/bin/java"'
  
negative.code:     install bin/sbt $out/bin
  
      wrapProgram $out/bin/sbt --prefix PATH : ${lib.makeBinPath [ which curl ]}
  
      runHook postInstall
    '';
  
    doInstallCheck = true;
  