diff --git a/roles/mailman/files/post-update.sh b/roles/mailman/files/post-update.sh
index e66500b177..ed1a742b7f 100755
--- a/roles/mailman/files/post-update.sh
+++ b/roles/mailman/files/post-update.sh
@@ -1,11 +1,14 @@
 #!/bin/bash
 
 CONFFILE=/etc/mailman-migration.conf
-BASEDIR=`yamlget basedir $CONFFILE`
-CONFDIR=`yamlget confdir $CONFFILE`
 
 set -e 
 
+export PATH=$PATH:$(dirname $(realpath $0)) # make yamlget available
+
+BASEDIR=`yamlget basedir $CONFFILE`
+CONFDIR=`yamlget confdir $CONFFILE`
+
 django-admin collectstatic --clear --noinput --pythonpath $CONFDIR --settings settings
 django-admin assets build --parse-templates --pythonpath $CONFDIR --settings settings
 django-admin syncdb --pythonpath $CONFDIR --settings settings_admin