set a rubygem mirror on binary-builder tasks using it
set a rubygem mirror on binary-builder tasks using it

A new concourse credentials is required rubygem-mirror.
To use a mirror, add
   rubygem-mirror: https://gems.bmonkeys.net
or without mirror, add
   rubygem-mirror: none

cloudfoundry/buildpacks-ci,orange-cloudfoundry/buildpacks-ci,orange-cloudfoundry/buildpacks-ci,orange-cloudfoundry/buildpacks-ci,cloudfoundry/buildpacks-ci,cloudfoundry/buildpacks-ci,cloudfoundry/buildpacks-ci,cloudfoundry/buildpacks-ci