nixos/steam: always apply extraLibraries and make them additive

Before, setting {option}`programs.steam.package` would result in a steam without
the {option}`hardware.opengl.package`, {option}`hardware.opengl.extraPackages`
etc. You had to manually add them yourself.

Additionally, overlaying `steam = prev.steam.override { extraLibraries = [ ... ]; }`
resulted in those extra libraries not actually being put into the fhsenv because
they'd be fully overridden by the option's default.

Now, the user can supply a custom steam to {option}`programs.steam.package` with
its own list of extraLibraries which will not be overridden and overlays work as
expected too.

0 files changed, 0 insertions, 0 deletions