PostGIS addon for PostgreSQL 10 started failing

[BanzaiMan]

Sometimes build fails when apt is updating postgresql apt repository

This looks like an upstream problem. Traditional apt mirror format is inherently prone to race conditions. This is fixed in Bug #1430011 “support apt by-hash mirrors” : Bugs : Launchpad by providing a mirror format with hash-based file names, support for which is available since Ubuntu 16.04. But http://apt.postgresql.org/pub/repos/apt/ does not use this new format. I reported this at https://redmine.postgresql.org/issues/4679.