nixos-container: runInContainer to enter all namespaces

for compatibility with nspawn --private-users=

pkgs/by-name/ni/nixos-container/nixos-container.pl

@@ -364,7 +364,7 @@ sub restartContainer {
 sub runInContainer {
     my @args = @_;
     my $leader = getLeader;
-    exec($nsenter, "-t", $leader, "-m", "-u", "-i", "-n", "-p", "--", @args);
+    exec($nsenter, "--all", "-t", $leader, "--", @args);
     die "cannot run ‘nsenter’: $!\n";
 }