Setting up Ruby 3.0.0 on Windows 10 or WSL2 Ubuntu (updated)

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Update: You can now just do gem update --system and be just fine, but the steps are still there for installing RVM.

Ruby 3.0 was released recently and seems to be fully backwards compatible with Ruby < 3.0 (2.7, etc).

I need a dual setup, as I use a linter and intellisense highlighter in VScode, and the Gem (rubocop and solargraph) won't pick up from WS2L (and I don't think it was designed to, either...).

You can get the installer for Windows here; Just follow the directions in the console and you're good to go. But how about on WSL2/Ubuntu?

(Also, the bundler/RubyGems steps below, and installing net-http-persistent apply to the Windows version of Ruby 3.0.0 as well!) Is the answer.

First, head to

On Ubuntu, install gnupg2:

sudo apt install gnupg2

Then, as of this writing from

gpg2 --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB

To receive the keys needed.


\curl -sSL | bash -s stable

To get the current stable version of RVM.

Once RVM is installed, don't forget to follow the source directions; it is something like:

* To start using RVM you need to run `source /home/aritywolf/.rvm/scripts/rvm` in all your open shell windows, in rare cases you need to reopen all shell windows.

Now that we've got a stable version of RVM installed, it's time to install Ruby 3.0.0:

rvm install ruby-3.0.0

Now we have Ruby 3.0 installed with RVM managing the Ruby.

However, there is a slight problem; we receive a RubyGem related error:

Error running 'run_gem_wrappers regenerate', please read /home/aritywolf/.rvm/log/1609499010_ruby-3.0.0/gemset.wrappers.default.log

To work around this, use:

gem update --system 3.1.4

Then, install Bundler to manage RubyGems:

gem install bundler

Then, a workaround to be able to work with bundler in Ruby-3.0.0, for Windows OR Linux:

gem install net-http-persistent -v 2.9.4

In your directory if you're working on a project, you should be able to do

bundle install

I had some problems with setting up my sinatra and puma server environment, but Ruby 3.0.0 works as if it were < 3.0.0 otherwise!

Enjoy Your Speed Boost!

Happy New Year!

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