--- rbclient.pl	2009-06-25 23:46:21.000000000 +0200
+++ rbclient.pl.new 2009-06-25 23:46:05.000000000 +0200
@@ -516,7 +516,7 @@
{
my ($id) = @_;
my $pid = $builds{$id}{pid};
- kill -9, $pid;
+ kill 9, -$pid;
print "Killed build $id\n";
waitpid $pid, 0;