Cabal update

[roberth]

nightly-2020-11-23 currently compiles Setup with Cabal 3.2.0.0, which has broken C++ support. This has been fixed in Cabal 3.2.1.0.
Is it possible to update the Cabal library used in the snapshot?
I couldn't find docs in the repo about such a change.

Blocks fpco/inline-c#121 (comment)

[bergmark]

I think the Cabal version is tied to what's used by GHC unfortunately. So we may have to wait for GHC 8.10.3.

[roberth]

As a workaround, I'm overriding ghc in my Stack shell.nix file.

buildStackProject {
  # Override ghc to get a working cabal with GHC 8.10.2
  # See https://github.com/commercialhaskell/stackage/issues/5762
  # TODO: when updating GHC, revert this to
  # inherit ghc;
  ghc = pkgs.haskell.packages.ghc8102.ghcWithPackages (p: [ p.Cabal_3_2_1_0 ]);

  # ...
}

[roberth]

GHC 8.10.3 has been released and it seems like this can't currently be addressed generically in stackage itself.