* no released version of hackage2nix does support distribution-nixpkgs yet.
* hackage-db 2.1.2 fixes an annoying bug introduced in 2.1.1 and also supports
Cabal 3.4: https://github.com/NixOS/cabal2nix/issues/501
Stackage Nighly recently upgraded their version of hackage-db from 2.1.0
to 2.1.1. 2.1.1 had a compatibility fix for Cabal 3.4 [1]. However it
did not increase the version bound on Cabal nor fails to compile with
Cabal 3.2, so Stackage was able to update it.
Unfortunately hackage-db with Cabal 3.2 causes observable issues [2]
in cabal2nix, so we need to downgrade it for all compilers that still
ship a Cabal version < 3.4.
Also ideally we should update the constraints for hackage-db 2.1.0 and
hackage-db 2.1.1 on hackage. See also [3].
[1]: https://github.com/peti/hackage-db/pull/12
[2]: https://github.com/NixOS/cabal2nix/issues/501
[3]: https://github.com/peti/hackage-db/pull/14
They are not an exposed part of haskellPackages per se, so we shouldn't
list them in nix-env. Additionally this should prevent the failed lldb
build from cluttering our jobset output.
In preparation of the upcoming 0.6.0 release I wanted to fix hls.
It introduces two new plugin packages, which are not on hackage yet.
I remove apply-refact overrides, because current apply-refact versions
are compatible with all ghcs we support, according to their changelog.
I override more of the hls dependencies globally on the whole package
set, to avoid a lot of duplicate compilations. And because @peti changed
my mind about this being a good practice.
hls now uses a released version of ghcide
`cabal2nix` fails to evaluate due to attempting to
evaluate `pkgs.haskellPackages.hackage-db_2_1_0`, which
does not exist. However, the default
`pkgs.haskellPackages.hackage-db` is already version 2.1.0,
so the fix is simple: go back to using the default version.
Without this change, the build fails with:
```
Warning:
This package indirectly depends on multiple versions of the same package. This is very likely to cause a compile failure.
package hackage-db (hackage-db-2.0.1-AliTRXEJBGFAEMpONOEnbV) requires Cabal-2.4.0.1
package hpack (hpack-0.32.0-1iJuukTWmC4EGkYhAiFeII) requires Cabal-3.0.0.0-CD1INMNwoxXIKVgcu1nec5
package distribution-nixpkgs (distribution-nixpkgs-1.3.1-82Z2DCdLAUs8Q2gjtlPLz5) requires Cabal-3.0.0.0-CD1INMNwoxXIKVgcu1nec5
package cabal2nix (cabal2nix-2.15.0) requires Cabal-3.0.0.0-CD1INMNwoxXIKVgcu1nec5
package cabal2nix (cabal2nix-2.15.0) requires Cabal-3.0.0.0-CD1INMNwoxXIKVgcu1nec5
package cabal2nix (cabal2nix-2.15.0) requires Cabal-3.0.0.0-CD1INMNwoxXIKVgcu1nec5
```
