anchor.diff:        net
         vultr
       ];
  -    date = "2017-05-05";
  +    date = "2017-06-18";
     };
   
     lemma = buildFromGitHub {
  -    version = 2;
  -    rev = "cbfbc8381e93147bc50db64509634327d0f6d626";
  +    version = 3;
  +    rev = "4214099fb348c416514bc2c93087fde56216d7b5";
       owner = "mailgun";
       repo = "lemma";
  -    sha256 = "1rqg0fw94vavi6a9c0cgc0xg9gy6p25ps2p9bs65flda60cm59ph";
  -    date = "2016-09-01";
  +    sha256 = "1xm2bz2z3v4fwv53qzb6ayxqmjjhalp0kq1gr49sq2xmslhcl83q";
  +    date = "2017-06-19";
       propagatedBuildInputs = [
         crypto
         metrics
  
positive.code:     version = 3;
      owner = "btcsuite";
      repo = "btcd";
      date = "2017-06-08";
      rev = "1bdb71328511a5225d6300c3c08a79172f667996";
      sha256 = "130j72lclsz8nkzy7sqy53a1ccsg8pp5z96j1j8crymny008qyh8";
      subPackages = [
        "btcec"
      ];
  
negative.code: 
    swift = buildFromGitHub {
      version = 3;
      rev = "9e6fdb8957a022d5780a78b58d6181c3580bb01f";
      owner  = "ncw";
      repo   = "swift";
      sha256 = "0r3v88p8wzx01jz5sph9rdf17zvm1radb01y7gp7ym357mcmf1pv";
      date = "2017-06-19";
    };
  
    anacrolix_sync = buildFromGitHub {
  