Could not find hoptoad_notifier-2.3.6 in any of the sources

[timhaines]

My Gemfile contains these and more:

source :gemcutter
source 'http://rubygems.org'
source 'http://gems.github.com'
gem 'hoptoad_notifier'

When I run bundle install --path --deployment --without development test

I get the error:

Could not find hoptoad_notifier-2.3.6 in any of the sources

However, if I remove the --deployment flag, it installs the gem correctly.