@peterhoeg, thanks for your PR! By analyzing the history of the files in this pull request, we identified @aske, @abbradar and @vcunat to be potential reviewers.

It may be better to do NIX_LDFLAGS = [ "-lflac" ... ]; instead -- this way it won't leak to subprocesses and doesn't require a wrapper.

@abbradar interesting, that fixes the binary at runtime?

@LnL7 Should be -- it would link the library to all the produced binaries, so dlopen finds them without any other measures.

@abbradar any idea where that happens?

@LnL7 You mean where NIX_LDFLAGS is used? Look at our compiler wrappers, specifically pkgs/build-support/cc-wrapper/ld-wrapper.sh.

Thanks for the pointer @abbradar. Much more elegant!

As a side note, I don't think we should fix file warnings case by case (it should be fixed everywhere which is not happening or left as is since it's harmless), but that's just my IMHO. Let's merge, thanks!