* Remove operational custom version

* Update index to get new version

* Use operational released version

* Remove custom operational version in nix

* Remove operational for ghc-9.2

* Add Nix override for operational

Nixpkgs hasn't caught up with hackage yet.

Co-authored-by: Michael Peyton Jones <me@michaelpj.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>