$ PGPASSWORD=password psql --host=localhost --port=5432 --username=admin --dbname=db
psql (9.3.9, server 9.4.4)
WARNING: psql major version 9.3, server major version 9.4.
         Some psql features might not work.
Type "help" for help.

db=> CREATE EXTENSION "uuid-ossp";
ERROR:  could not open extension control file "/opt/rh/rh-postgresql94/root/usr/share/pgsql/extension/uuid-ossp.control": No such file or directory