pkgs/apply-config: fixups

the nix-env logic was still broken. It seems to have extremely weird
failure modes under which it does not report errors when doing
nix-env --set, or else the switch-to-configuration.pl script does not
properly install the boot loader entry when it was installed via --set
instead of --install.

I'm not entirely clear on why yet, will need some investigating.

0 files changed, 0 insertions, 0 deletions