my $killuser = $ENV{GRUNTMASTER_KILL_USER};
my @sudo;
@sudo = (shellwords ($ENV{GRUNTMASTER_SUDO}), '--') if $ENV{GRUNTMASTER_SUDO} && $nobody;
-$mlimit = 1_000_000_000 if @sudo; # sudo wants a lot of address space
+undef $mlimit if @sudo; # sudo wants a lot of address space
my $ret = fork // die 'Cannot fork';
if ($ret) {