* I hardwired CABAL_CONFIG and CABAL_DIR as Nix store paths in nix-x-cabal. And it broke HLS since it tries to build on start up emitting intermidiate outputs in CABAL_DIR.
Is it basically a bad idea to do so, even though I can figure out how to work around this specific issue?
ivy: I've looked into it and it seems like it was broken at one point and the Nixpkgs maintainer had no access to a Darwin machine to investigate the failure. Probably has been resolved by Apple SDK changes or whatever. I've proposed the correct meta data update at https://github.com/NixOS/nixpkgs/pull/447134.