You can install jets via RubyGems.

gem install jets

Or you can add jets to your Gemfile in your project.

gem "jets"



You can install the AWS CLI via pip.

pip install awscli --upgrade --user

Then configure it.

aws configure    



Jets uses Ruby 2.5.0 and code written with patch variants of it will work.


For apps with HTML pages, jets uses webpacker to compile assets which requires node’s yarn. Node version manager, nvm, is recommended to install a desired version of node. Once node is installed, install yarn with:

npm install -g yarn

You can use any version of yarn that works with webpacker.


The currently supported and default ORM database is PostgreSQL. When you run jets new command, it generates a Gemfile that has the pg gem. A bundle install is run as part of the jets new command. So you need PostgreSQL installed as a dependency. Here are various ways to install it.

brew install postgresql # macosx
yum install -y postgresql-devel # amazonlinux2 and redhat variants
apt-get install libpq-dev # ubuntu and debian variants

If you do not need an ORM database adapter, you can use the --no-database option and jets new will not insert the pg gem to the Gemfile.

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