nixosTests.lxc: move to runTestOn

nixos/tests/all-tests.nix

@@ -889,7 +889,7 @@ in
   lorri = handleTest ./lorri/default.nix { };
   luks = runTest ./luks.nix;
   lvm2 = handleTest ./lvm2 { };
-  lxc = handleTest ./lxc { };
+  lxc = runTestOn [ "x86_64-linux" "aarch64-linux" ] ./lxc;
   lxd-image-server = runTest ./lxd-image-server.nix;
   lxqt = runTest ./lxqt.nix;
   ly = runTest ./ly.nix;

nixos/tests/lxc/default.nix

@@ -1,7 +1,6 @@
-import ../make-test-python.nix (
-  { pkgs, lib, ... }:
+{ pkgs, lib, ... }:
 
-  let
+let
   releases = import ../../release.nix {
     configuration = {
       # Building documentation makes the test unnecessarily take a longer time:
@@ -15,21 +14,20 @@ import ../make-test-python.nix (
   lxc-image-metadata =
     releases.incusContainerMeta.${pkgs.stdenv.hostPlatform.system}
     + "/tarball/nixos-image-lxc-*-${pkgs.stdenv.hostPlatform.system}.tar.xz";
+  # the incus container rootfs is in squashfs, but lxc requires tar.xz so use containerTarball
   lxc-image-rootfs =
     releases.containerTarball.${pkgs.stdenv.hostPlatform.system}
     + "/tarball/nixos-image-lxc-*-${pkgs.stdenv.hostPlatform.system}.tar.xz";
 
-  in
-  {
+in
+{
   name = "lxc-container-unprivileged";
 
   meta = {
     maintainers = lib.teams.lxc.members;
   };
 
-    nodes.machine =
-      { lib, pkgs, ... }:
-      {
+  nodes.machine = {
     virtualisation = {
       diskSize = 6144;
       cores = 2;
@@ -127,5 +125,4 @@ import ../make-test-python.nix (
 
     machine.fail("su -- bob -c 'lxc-start test'")
   '';
-  }
-)
+}