fetchFromGitHub {
owner = "rust-lang";
repo = "crates.io-index";
rev = "f3b845cef8d302d39c4b796d6c55df1dcd5964e5";
sha256 = "185lh1agx5x7ggrijd3n4lpch8z2699yf3gj3m4ayvw90g0bm1m6";
}