{
  unstable = {
    wineVersion = "1.7.55";
    wineSha256  = "06b1sgjxycbr1qsy33z5w22ykz12kkdsfq2yl7qmx9s5rg4zcj51";
    geckoVersion = "2.36";
    geckoSha256 = "12hjks32yz9jq4w3xhk3y1dy2g3iakqxd7aldrdj51cqiz75g95g";
    gecko64Version = "2.36";
    gecko64Sha256 = "0i7dchrzsda4nqbkhp3rrchk74rc2whn2af1wzda517m9c0886vh";
    monoVersion = "4.5.6";
    monoSha256 = "09dwfccvfdp3walxzp6qvnyxdj2bbyw9wlh6cxw2sx43gxriys5c";
  };
  stable = {
    wineVersion = "1.6.2";
    wineSha256  = "1gmc0ljgfz3qy50mdxcwwjcr2yrpz54jcs2hdszsrk50wpnrxazh";
    geckoVersion = "2.21";
    geckoSha256 = "1n0zccnvchkg0m896sjx5psk4bxw9if32xyxib1rbfdasykay7zh";
    gecko64Version = "2.21";
    gecko64Sha256 = "0grc86dkq90i59zw43hakh62ra1ajnk11m64667xjrlzi7f0ndxw";
    monoVersion = "4.5.6";
    monoSha256 = "09dwfccvfdp3walxzp6qvnyxdj2bbyw9wlh6cxw2sx43gxriys5c";
  };
  staging = {
    version = "1.7.55";
    sha256 = "16hs1q2ff7frja36pnriprxrpvk22bacjbigbscayshhlj958a8m";
  };
  winetricks = {
    version = "20151110";
    sha256 = "1aq8rkqq8mdksb5c4gc3k9plh3zc28gffi7y29v9vyk4f25j64sz";
  };
}