anchor.diff:  
     imaging = buildFromGitHub {
       version = 6;
  -    rev = "v1.5.0";
  +    rev = "v1.4.2";
       owner  = "disintegration";
       repo   = "imaging";
  -    sha256 = "KTudZPHuAaSLfIAu9i3G94sx6LGhMuNcbncqZ6ep6mQ=";
  +    sha256 = "12w3371299nahjgrpbmsivs9a9642xif043bnvd61k9d26zb9z6f";
       propagatedBuildInputs = [
         image
       ];
  
positive.code:     version = 6;
      owner = "libp2p";
      repo = "go-addr-util";
      rev = "v2.0.5";
      sha256 = "f079keQ8tg4MkrwyTfPVb2KggpBiY9ShZG9Nq5/xs+w=";
      propagatedBuildInputs = [
        go-log
        go-ws-transport
  
negative.code: 
    console = buildFromGitHub rec {
      version = 6;
      rev = "4d8a41f4ce5b9bae77c41786ea2458330f43f081";
      owner = "containerd";
      repo = "console";
      sha256 = "1rv1iyi4g565fxp5m686ag08jx1cwp7j9rw6ln8x6kaycn9grazy";
      date = "2018-07-05";
      propagatedBuildInputs = [
        errors
        sys
  