Update nixpkgs and GHC

[elopez]

Our nixpkgs is pinned. Newer nixpkgs have GHC 9.10+ and other goodies and changes and we want to keep up with them

• Investigate performance regressions with GHC 9.10
• Look into the state of TemplateHaskell on nixpkgs GHC >= 9.6 TemplateHaskell doesn't work in pkgsStatic NixOS/nixpkgs#275304
  • There's some work that should alleviate these pain points going on in nixpkgs right now
  • If needed, we can switch to building haskell on pkgsMusl + dependencies from pkgsStatic, this also can also yield a static binary. We use this trick in Echidna.
• Update nixpkgs with GHC 9.10
  • Work ongoing in flake: update inputs, fix build with GHC 9.10 #884
  • Might need to jailbreak/fork aeson-optics to be able to build on Windows? Maintainer seems unresponsive