Hi Smith, Please cherry pick below patch to solve it. https://review.openstack.org/626029 Best Regards Shuicheng From: Peter Smith [mailto:salerio@gmail.com] Sent: Wednesday, December 19, 2018 6:09 PM To: starlingx-discuss@lists.starlingx.io Subject: [Starlingx-discuss] Problem building lentos mirror using supplied Dockerfile Hi, a fresh clone of six-tools master branch followed by make results in the following error while attempting to yum install gaolang. On investigation it seems that the URL does indeed no longer exist. http://vault.centos.org/centos/7/cloud/Source/openstack-queens/repodata/repo...: [Errno 14] HTTP Error 404 - Not Found Trying other mirror. To address this issue please refer to the below knowledge base article https://access.redhat.com/articles/1320623 Peter Smith