{
  unstable = {
    wineVersion = "1.7.47";
    wineSha256  = "0bmvgcag0kv0671dj6fbfdz86ij91rb2kp2dssqw83a0xidgfx5s";
    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";
    ## TESTME wine stable should work with most recent mono
    #monoVersion = "0.0.8";
    #monoSha256 = "00jl24qp7vh3hlqv7wsw1s529lr5p0ybif6s73jy85chqaxj7z1x";
  };
  staging = {
    version = "1.7.47";
    sha256 = "0m47v4jbc70b7qxj0lqnc7an1xlcb81b6k7dwzjyk3pv3ixp2snp";
  };
  winetricks = {
    version = "20150706";
    sha256 = "1n9xbav4q0dpfdmmjcahi4izyhvy2f7ddrq7gyhrm6pxs2zli888";
  };
}