haskell: workaround for bug with dynamic libraries on darwin

[LnL7]

Motivation for this change

Workaround for haskell/cabal#4183
It seems like --extra-lib-dirs from the previous steps is not detected properly,
to work around this we build using a DYLD_LIBRARY_PATH and fixup the build afterwards.

/cc @domenkozar

Things done

• Tested using sandboxing
  (nix.useSandbox on NixOS,
  or option build-use-sandbox in nix.conf
  on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • Linux
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Fits CONTRIBUTING.md.

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[mention-bot]

@LnL7, thanks for your PR! By analyzing the history of the files in this pull request, we identified @peti, @cstrahan and @Ericson2314 to be potential reviewers.

[peti]

Pushed to haskell-updates in c3a58ad2bfc44c9924f99c7d08da25bffbc50105. I'll merge to master once the test builds at http://hydra.nixos.org/jobset/nixpkgs/haskell-updates confirm that everything still works as expected. 😁

[LnL7]

Great! I tested it locally for rocksdb, it's a bit of a hack but it should fix a whole bunch of packages until this is fixed properly upstream.

[LnL7]

Merged master at 19e2e72.

[LnL7]

I assumed that #16357 would also be fixed by this, but it looks like something still goes wrong during the checkPhase.