Describe the bug
wxPython_4_0, while accounting for darwin somewhat, does not build there
likely because it uses wxGTK rather than wxmac
this prevents kicad from being built on darwin

To Reproduce
Steps to reproduce the behavior:
0. on darwin, nix-build '<nixpkgs>' -A wxPython_4_0

Expected behavior
wxPython_4_0 to build on darwin and be usable by kicad there

Additional context
i maintain the kicad package and already tried pinging the principle contributor

Notify maintainers
while there are no listed maintainers for this package
it was initially contributed by @tbenst (if you already investigated after the kicad PR ping, nothing relevant changed since)
and has a fair amount of contributions by @FRidh

Maintainer information:

# a list of nixpkgs attributes affected by the problem
attribute: wxPython_4_0
# a list of nixos modules affected by the problem
module: