anchor.diff:  
     go-ethereum = buildFromGitHub {
       version = 3;
  -    date = "2017-08-11";
  -    rev = "6ca59d98f88d4b4cc8bdeb2f023ff8c1fa228c6f";
  +    date = "2017-08-18";
  +    rev = "bf1e2631281e1e439533f2abcf1e99a7b2f9552a";
       owner  = "ethereum";
       repo   = "go-ethereum";
  -    sha256 = "1nfcgnm3zd57pjqzishjsz7dvz2q7c0kspxi8pj1iv79lgyfhyh8";
  +    sha256 = "0i1zk2id0cs57n6hsm8q5kr25yl3nrwjq7h2yf7xp4fz1xhynfx4";
       subPackages = [
         "crypto/sha3"
       ];
  
positive.code: 
    mow-cli = buildFromGitHub {
      version = 3;
      rev = "82aefbee1e23d398752fbe663f964a6d87016434";
      owner  = "jawher";
      repo   = "mow.cli";
      sha256 = "19xfnl5shxzz46m8vsl6p97wq0p1cg1rxj8siyx2h6qgcwy2x3bc";
      date = "2017-08-02";
    };
  
    ns1-go_v2 = buildFromGitHub {
  
negative.code:     date = "2017-06-13";
    };
  
    go-shared = buildFromGitHub {
      version = 3;
      rev = "v0.0.8";
      owner  = "pengsrc";
      repo   = "go-shared";
      sha256 = "1iy3xsrnvj64m3k7fkg307sm274r15300p8a9f1z8547j1wcnsjk";
      propagatedBuildInputs = [
        gabs
        logrus
        yaml_v2
      ];
    };
  
    go-shellwords = buildFromGitHub {
      version = 2;
      rev = "v1.0.3";
      owner  = "mattn";
      repo   = "go-shellwords";
      sha256 = "11prxlsk3kwgq6v5ikdsjv5vjv4hfihvw55qc27jip1ia2grcxvz";
    };
  
    go-shuffle = buildFromGitHub {
      version = 3;
      owner = "shogo82148";
      repo = "go-shuffle";
      date = "2017-08-08";
      rev = "59829097ff3b062427a69e2c461ef60523e37280";
      sha256 = "0bmad1aljj4afl6r1h1wqaiw9f2gxn1xb3kwsg0d2rn15497a2k2";
    };
  
    go-simplejson = buildFromGitHub {
  