The following bug has been logged on the website:
Bug reference: 14956
Logged by: Tim Rightnour
Email address: root@garbled.net
PostgreSQL version: 9.6.6
Operating system: RHEL6
Description:
for Postgres 96, psycopg2 rpm in the RHEL6 repository has a dependency
against the postgres94 library rpm, making installation impossible without
installing both 94 and 96.