anchor.diff:      version = 5;
       owner = "libp2p";
       repo = "go-libp2p";
  -    date = "2017-12-29";
  -    rev = "4bba0bb6b8570822668f66d4f70c083fa4707ee7";
  -    sha256 = "09syphrgy6ahm8zy34hlim1drg4m0gc80l8vnh34vy18pvdp06vm";
  +    date = "2018-01-07";
  +    rev = "7db6e54f35380819c4decc7fd1c41f66f1e09db7";
  +    sha256 = "0i6av0ym4pjpbw9p4n9kvf7vcn831rld0y89mlzczd6w83a5mbkx";
       excludedPackages = "mock";
       propagatedBuildInputs = [
         goprocess
  
positive.code: 
    mongo-tools = buildFromGitHub {
      version = 5;
      rev = "r3.6.1";
      owner  = "mongodb";
      repo   = "mongo-tools";
      sha256 = "1wlniank7s0x20ynb0vr1q8aznc2l8x3xf78qxk9ih6qjbspbxay";
      buildInputs = [
        crypto
        escaper
  
negative.code:   };
  
    mysql = buildFromGitHub {
      version = 5;
      rev = "4a0c3d73d8579f9fc535cf5e654a651cbd57dd6e";
      owner  = "go-sql-driver";
      repo   = "mysql";
      sha256 = "1bi7gl9rqk8s5p29sck356d7fki9plnz0kqksy01ky9hn1kp4izn";
      postPatch = ''
        grep -r '+build appengine' -l | xargs rm
      '';
      date = "2018-01-10";
    };
  
    names_v2 = buildFromGitHub {
  