This is part of paving the way for clearly distinguishing between
packages from nixpkgs and //third_party.
See also: b/108, cl/2910
Change-Id: I28b5abd1f0f9fa3c4478c9f255b2025f4a4139f1
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2917
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: Profpatsch <mail@profpatsch.de>
Reviewed-by: tazjin <mail@tazj.in>
