--- tmpwatch.cron~	2006-09-19 15:36:09.000000000 +0200
+++ tmpwatch.cron	2006-09-19 15:36:31.000000000 +0200
@@ -29,7 +29,7 @@
 
 # Delete everything in PORTAGE_TMPDIR that hasn't been modified in 2 weeks.
 #
-# if [[ -d ${PORTAGE_TMPDIR:-/var/tmp/portage} ]]; then
+# if [[ -d ${PORTAGE_TMPDIR:-/var/tmp/portage}  && -z $(/usr/bin/pgrep emerge) ]]; then
 #   ${TMPWATCH} --mtime --all 336 ${PORTAGE_TMPDIR:-/var/tmp/portage}
 # fi