--- redmine.postrm.orig	2017-07-19 14:04:35.000000000 -0700
+++ redmine.postrm.new	2017-07-19 14:06:18.000000000 -0700
@@ -7,7 +7,7 @@
   . /usr/share/dbconfig-common/dpkg/postrm
 
   # remove both current and old instances
-  instances=$(ls -1 /etc/redmine/*/database.yml | xargs dirname | xargs -n 1 basename)
+  instances=$(find /etc/redmine -name database.yml | xargs dirname | xargs -n 1 basename)
   for inst in $instances; do
     dbc_go redmine/instances/$inst "$@"