{
  liminix
, nixpkgs
}:
let img = (import liminix {
      device = import "${liminix}/devices/qemu/";
      liminix-config = "${liminix}/vanilla-configuration.nix";
    }).outputs.squashfs;
    pkgs = import <nixpkgs> {};
in pkgs.runCommand "check" {
  nativeBuildInputs = with pkgs; [ squashfsTools s6-rc ] ;
} ''
destpath=$(mktemp -d)/smoke.img
echo $destpath
cleanup(){  test -n $destpath && test -d $destpath && chmod -R +w $destpath && rm -rf $destpath;  }
trap cleanup EXIT
trap 'echo "command $(eval echo $BASH_COMMAND) failed with exit code $?"; exit $?' ERR
unsquashfs -q -d $destpath -excludes ${img}  /dev
cd $destpath;
db=nix/store/*-s6-rc-database/compiled/
test -d $db
chmod -R +w $db
# check we have closure of config.services (lo.link service exists only
# as a dependency)
test "$(s6-rc-db -c $db type lo.link)" = "oneshot"
test "$(s6-rc-db -c $db type ntp)" = "longrun"
echo OK > $out
''