Find the ghc binary path from libdir

Hello everyone! I want to find out the location of the `ghc` (and `ghc-pkg`) executable given the `$libdir` (obtained by `ghc --print-libdir`). Is there a platform independent way of doing that, which we can rely on? E.g. on windows, we found that the ghc executable's location is: * `$libdir/../bin/ghc` For NixOs (or when using ghcup), it works with: * `$libdir/../../bin/ghc` but I worry that this is a just an accident that is not guaranteed by the installation process. I also noticed there seems to be a binary in * `$libdir/bin/ghc` Is one of these ways documented to be guaranteed by the ghc installation process? (P. S. first time using a mailing list, hope I am doing it correctly) Best regards, Fendor