Add name mapping for libxxhash to xxHash

[mrcjkb]

haskellPackages.xxhash-ffi (if the pkg-config flag is enabled) depends on libxxhash, which is packaged as xxHash in nixpkgs.

Note: The build is actually broken because it can't find pkg-config:

Error: Setup: The program 'pkg-config' version >=0.9.0 is required but it
could not be found

So this is probably not enough to unbreak the package, but I think it will be necessary.

[sternenseemann]

So this is probably not enough to unbreak the package

It'll be enough. pkg-config is made available as soon as we have a dependency that needs to be discovered using pkg-config.

[sternenseemann]

Applied in nixpkgs as NixOS/nixpkgs@1f230cd. You may need to send a PR to haskell-updates to remove the broken flag from the affected packages.

[mrcjkb]

Thanks for the heads-up 🙏
I guess it will be marked as unbroken with the next hackage-packages update?
If so, I'm in no rush. Otherwise, how do I remove the broken flag without updating all the packages? I'm assuming there's a maintainers script for that?

[sternenseemann]

I expect someone will remove the stale broken flags semi-automatically this rotation, so you can probably just wait. Otherwise you'd remove the offending lines from configuration-hackage2nix/broken.yaml and run maintainers/scripts/haskell/regenerate-hackage-packages.sh.