Hi, A patch in neutronclient [1] which updates iso8601 requirement to 0.1.8 fails with grenade due to iso8601 version mismatch [2]. (It blocks the patch for a month.) The error occurs in old devstack (i.e., grizzly devstack). I I see both iso8601 requirements of 0.1.4 and 0.1.8 in devstack log. It seems it is similar to an issue addressed in testing infra during Havana cycle. What is the way to address it? 2013-12-06 23:44:46.313 | 2013-12-06 23:44:46 Installed /opt/stack/old/nova 2013-12-06 23:44:46.313 | 2013-12-06 23:44:46 Processing dependencies for nova==2013.1.5.a17.g4655df1 2013-12-06 23:44:46.314 | 2013-12-06 23:44:46 error: Installed distribution iso8601 0.1.4 conflicts with requirement iso8601>=0.1.8 [1] https://review.openstack.org/#/c/56654/ [2] http://logs.openstack.org/54/56654/1/check/check-grenade-dsvm/116b47e/ [3] http://logs.openstack.org/54/56654/1/check/check-grenade-dsvm/116b47e/console.html.gz#_2013-12-06_23_44_46_313 Thanks, Akihiro