puppetserver 1.0.8-1puppetlabs1 no longer honours proxy for installing gems

When using puppet server 1.0.8, I can no longer install gems via our proxy server:

puppetserver gem install hiera-eyaml -v 1.1.4
ERROR: Could not find a valid gem 'hiera-eyaml' (= 1.1.4), here is why:
Unable to download data from https://rubygems.org/ - Errno::ECONNREFUSED: Connection refused - Connection refused (https://rubygems.org/specs.4.8.gz)

Downgrading to 1.0.2-1puppetlabs1 resolved this issue for me:
puppetserver gem install hiera-eyaml -v 1.1.4
Fetching: trollop-2.1.2.gem (100%)
Successfully installed trollop-2.1.2
Fetching: highline-1.7.1.gem (100%)
Successfully installed highline-1.7.1
Fetching: hiera-eyaml-1.1.4.gem (100%)
Successfully installed hiera-eyaml-1.1.4
3 gems installed