nixpkgs/pkgs/data/misc/hackage/pin.json

{
  "commit": "ec4194ba6ed7589da64cb91db94144ce8688c464",
  "url": "https://github.com/commercialhaskell/all-cabal-hashes/archive/ec4194ba6ed7589da64cb91db94144ce8688c464.tar.gz",
  "sha256": "0346zc3s9myh7c6ixm9gcxwarpjhfl5maygj690ysmgl8fdqrd6v",
  "msg": "Update from Hackage at 2021-06-21T21:28:52Z"
}