anchor.diff:    # Some dependencies are from another packages. Try commenting them out; then during build
     # you'll get necessary revision information.
     ejdeps = {
  -    cache_tab = fetchFromGitHub {
  -      owner = "processone";
  -      repo = "cache_tab";
  -      rev = "1.0.1";
  -      sha256 = "1mq5vgqskb0v2pdn6i3610hzd9iyjznh8143pdbz8z57rrhxpxg4";
  -    };
  -    p1_tls = fetchFromGitHub {
  -      owner = "processone";
  -      repo = "tls";
  -      rev = "1.0.0";
  -      sha256 = "1q6l5drgmwj4fp4nfh0075lczplia4n40sirk9pd5x76d59qcmnj";
  -    };
  -    p1_stringprep = fetchFromGitHub {
  -      owner = "processone";
  -      repo = "stringprep";
  -      rev = "1.0.0";
  -      sha256 = "105xc0af61xrd4vjxrg49gxbij8x0fq4yribywa8qly303d1nwwa";
  -    };
  -    p1_xml = fetchFromGitHub {
  -      owner = "processone";
  -      repo = "xml";
  -      rev = "1.1.1";
  -      sha256 = "07zxc8ky78sd2mcbhhrxha68arbbk8vyayn9gwi402avnqcic7cx";
  -    };
  -    esip = fetchFromGitHub {
  -      owner = "processone";
  -      repo = "p1_sip";
  -      rev = "1.0.0";
  -      sha256 = "02k920995b0js6srarx0rabavs428rl0dp7zz90x74l8b589zq9a";
  -    };
  -    p1_stun = fetchFromGitHub {
  -      owner = "processone";
  -      repo = "stun";
  -      rev = "0.9.0";
  -      sha256 = "0ghf2p6z1m55f5pm4pv5gj7h7fdcwcsyqz1wzax4w8bgs9id06dm";
  -    };
  -    p1_yaml = fetchFromGitHub {
  -      owner = "processone";
  -      repo = "p1_yaml";
  -      rev = "1.0.0";
  -      sha256 = "0is0vr8ygh3fbiyf0jb85cfpfakxmx31fqk6s4j90gmfhlbm16f8";
  -    };
  -    p1_utils = fetchFromGitHub {
  -      owner = "processone";
  -      repo = "p1_utils";
  -      rev = "1.0.2";
  -      sha256 = "11b71bnc90riy1qplkpwx6l1yr9849jai3ckri35cavfsk35j687";
  -    };
  -    jiffy = fetchFromGitHub {
  -      owner = "davisp";
  -      repo = "jiffy";
  -      rev = "0.14.5";
  -      sha256 = "1xs01cl4gq1x6sjj7d1qgg4iq9iwzv3cjqjrj0kr7rqrbfqx2nq3";
  -    };
  -    oauth2 = fetchFromGitHub {
  -      owner = "kivra";
  -      repo = "oauth2";
  -      rev = "8d129fbf8866930b4ffa6dd84e65bd2b32b9acb8";
  -      sha256 = "0mbmw6668l945iqppba991793nmmkyvvf18zxgdahxcwgxg1majn";
  -    };
  -    xmlrpc = fetchFromGitHub {
  -      owner = "rds13";
  -      repo = "xmlrpc";
  -      rev = "1.15";
  -      sha256 = "0ihwag2hgw9rswxygallc4w1yipgpd6arw3xpr799ib7ybsn8x81";
  -    };
  -
  -    p1_mysql = fetchFromGitHub {
  -      owner = "processone";
  -      repo = "mysql";
  -      rev = "1.0.0";
  -      sha256 = "1v3g75hhfpv5bnrar23y7lsk3pd02xl5cy4mj13j0qxl6bc4dgss";
  -    };
  -    p1_pgsql = fetchFromGitHub {
  -      owner = "processone";
  -      repo = "pgsql";
  -      rev = "1.0.0";
  -      sha256 = "1r7dkjzxhwplmhvgvdx990xn98gpslckah5jpkx8c2gm9nj3xi33";
  -    };
  -    sqlite3 = fetchFromGitHub {
  -      owner = "alexeyr";
  -      repo = "erlang-sqlite3";
  -      rev = "cbc3505f7a131254265d3ef56191b2581b8cc172";
  -      sha256 = "1xrvygv0zhslsqf8044m5ml1zr6di7znvv2zycg3amsz190w0w2g";
  -    };
  -    p1_pam = fetchFromGitHub {
  -      owner = "processone";
  -      repo = "epam";
  -      rev = "1.0.0";
  -      sha256 = "0dlbmfwndhyg855vnhwyccxcjqzf2wcgc7522mjb9q38cva50rpr";
  -    };
  -    p1_zlib = fetchFromGitHub {
  -      owner = "processone";
  -      repo = "zlib";
  -      rev = "1.0.0";
  -      sha256 = "1a6m7wz6cbb8526fwhmgm7mva62absmvyjm8cjnq7cs0mzp18r0m";
  -    };
  -    hamcrest = fetchFromGitHub {
  -      owner = "hyperthunk";
  -      repo = "hamcrest-erlang";
  -      rev = "908a24fda4a46776a5135db60ca071e3d783f9f6";
  -      sha256 = "0irxidwrb37m0xwls6q9nn2zfs3pyxrgbnjgrhnh7gm35ib51hkj";
  -    };
  -    riakc = fetchFromGitHub {
  -      owner = "basho";
  -      repo = "riak-erlang-client";
  -      rev = "527722d12d0433b837cdb92a60900c2cb5df8942";
  -      sha256 = "13rkwibsjsl2gdysvf11r1hqfrf89hjgpa0x0hz2910f2ryqll3y";
  -    };
  -    # dependency of riakc
  -    riak_pb = fetchFromGitHub {
  -      owner = "basho";
  -      repo = "riak_pb";
  -      rev = "2.1.0.7";
  -      sha256 = "1p0qmjq069f7j1m29dv36ayvz8m0pcm94ccsnv5blykfg2c5ja0c";
  -    };
  -    # dependency of riak_pb
  -    protobuffs = fetchFromGitHub {
  -      owner = "basho";
  -      repo = "erlang_protobuffs";
  -      rev = "0.8.2";
  -      sha256 = "0w4jmsnc9x2ykqh1q6b12pl8a9973dxdhqk3y0ph17n83q5xz3h7";
  -    };
  -    rebar_elixir_plugin = fetchFromGitHub {
  -      owner = "processone";
  -      repo = "rebar_elixir_plugin";
  -      rev = "0.1.0";
  -      sha256 = "0x04ff53mxwd9va8nl4m70dbamp6p4dpxs646c168iqpnpadk3sk";
  -    };
  -    elixir = fetchFromGitHub {
  -      owner = "elixir-lang";
  -      repo = "elixir";
  -      rev = "v1.1.0";
  -      sha256 = "0r5673x2qdvfbwmvyvj8ddvzgxnkl3cv9jsf1yzsxgdifjbrzwx7";
  -    };
  -    p1_iconv = fetchFromGitHub {
  -      owner = "processone";
  -      repo = "eiconv";
  -      rev = "0.9.0";
  -      sha256 = "1ikccpj3aq6mip6slrq8c7w3kilpb82dr1jdy8kwajmiy9cmsq97";
  -    };
       lager = fetchFromGitHub {
         owner = "basho";
         repo = "lager";
  
positive.code:   };
  
  in stdenv.mkDerivation rec {
    version = "16.01";
    name = "ejabberd-${version}";
  
    src = fetchurl {
      url = "http://www.process-one.net/downloads/ejabberd/${version}/${name}.tgz";
      sha256 = "10fnsw52gxybw731yka63ma8mj39g4i0nsancwp9nlvhb2flgk72";
    };
  
    nativeBuildInputs = [ fakegit ];
  
negative.code:   LANG = "en_US.UTF-8";
  
    depsNames =
      [ "lager" "goldrush" "p1_utils" "cache_tab" "fast_tls" "stringprep" "fast_xml" "stun" "esip" "fast_yaml"
        "jiffy" "p1_oauth2" "p1_xmlrpc" "luerl"
      ]
      ++ lib.optional withMysql "p1_mysql"
      ++ lib.optional withPgsql "p1_pgsql"
      ++ lib.optional withSqlite "sqlite3"
      ++ lib.optional withPam "p1_pam"
      ++ lib.optional withZlib "ezlib"
      ++ lib.optionals withRiak [ "hamcrest" "riakc" "riak_pb" "protobuffs" ]
      ++ lib.optionals withElixir [ "elixir" "rebar_elixir_plugin" ]
      ++ lib.optional withIconv "iconv"
      ++ lib.optional withTools "meck"
      ++ lib.optional withRedis "eredis"
    ;
  