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D.

May 21, 2023 bundle install timing out

This weekend randomly I found bundle install to be timing out

Retrying download gem from https://rubygems.org/ due to error (2/4): Gem::RemoteFetcher::UnknownHostError timed out (https://rubygems.org/gems/shellany-0.0.1.gem)

My friend Meg Gutshall informed me that RubyGems is deprecating their Dependency API this week, so at first I thought that was the problem.

In the end, though, a couple of StackOverflow posts pointed me to some issues with Bundler and Gem resolving or connecting to advertised IPv6 addresses

  • StackOverflow: Timeout when installing ruby gems
  • StackOverflow: Ruby gem install comes up with timeout error every time

On MacOS first list your network devices:

networksetup -listallnetworkservices

which showed me

An asterisk (*) denotes that a network service is disabled.
USB3.0 5K Graphic Docking
Wi-Fi
Thunderbolt Bridge

Then I disabled IPv6 on your primary device:

networksetup -setv6off USB3.0\ 5K\ Graphic\ Docking

And now bundle install is lightning fast again.


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© David Alpert 2025