continuation of #109595
pkgconfig was aliased in 2018, however, it remained in
all-packages.nix due to its wide usage. This cleans
up the remaining references to pkgs.pkgsconfig and
moves the entry to aliases.nix.
python3Packages.pkgconfig remained unchanged because
it's the canonical name of the upstream package
on pypi.
gnumake can support subsecond mtimes if it is available. But Darwin
doesn’t support setting subsecond mtimes until 10.13! So we can just
disable this check to avoid the issue where most of our built tools
use seconds but make uses nanoseconds. Might fix some parallel issues
along the way.
Fixes#51221
This used to be the case before commit 531e4b80c9 which seems to
have dropped it by accident.
Removes one unnecessary build of pkgconfig during stdenv bootstrapping.
Ben Siraphob