{ fetchgit, callPackage }: let src = fetchgit { url = "https://github.com/krebs/cholerab"; rev = "25d7ef051d6fc74d99b155e768b3c650296a230c"; sha256 = "1pymw7v2ql42iq825ccx98s4fp9jsz5b2hjr1qad6bamfc6i7yy9"; }; in callPackage src {}