-if ! test -d /var/lib/postgresql/9.4/main ; then
- /usr/lib/postgresql/9.4/bin/initdb -D /var/lib/postgresql/9.4/main
+PGVERSION=11
+
+if ! test -d /var/lib/postgresql/$PGVERSION/main ; then
+ /usr/lib/postgresql/$PGVERSION/bin/initdb --locale=en_US.UTF-8 -D /var/lib/postgresql/$PGVERSION/main