{cabal} :

cabal.mkDerivation (self : {
  pname = "entropy";
  version = "0.2.1";
  sha256 = "1qp8hvdzfgg2wk7d431qycwbn2zpzlplc1c7dbhimj1had5jscrs";
  meta = {
    homepage = "http://trac.haskell.org/crypto-api/wiki";
    description = "A platform independent entropy source";
    license = self.stdenv.lib.licenses.bsd3;
    platforms = self.stdenv.lib.platforms.haskellPlatforms;
    maintainers = [ self.stdenv.lib.maintainers.andres ];
  };
})