This is a deprecation stub. Active metanorma-nist development has moved to a private GitHub Packages registry at the request of NIST. If you have authorised access, configure your Gemfile to pull from the private source: source "https://rubygems.pkg.github.com/metanorma" do gem "metanorma-nist" end See https://github.com/metanorma/metanorma-nist for access and migration information.