When I run `gem install gitlab-mail_room` on my server (Debian 11) I get the following error: ``` Building native extensions. This could take a while... ERROR: Error installing gitlab-mail_room: ERROR: Failed to build gem native extension. current directory: /var/lib/gems/2.7.0/gems/digest-3.1.0/ext/digest/bubblebabble /usr/bin/ruby2.7 -I /usr/lib/ruby/2.7.0 -r ./siteconf20220315-3628202-5r9tq3.rb extconf.rb creating Makefile current directory: /var/lib/gems/2.7.0/gems/digest-3.1.0/ext/digest/bubblebabble make "DESTDIR=" clean sh: 1: make: not found current directory: /var/lib/gems/2.7.0/gems/digest-3.1.0/ext/digest/bubblebabble make "DESTDIR=" sh: 1: make: not found make failed, exit code 127 Gem files will remain installed in /var/lib/gems/2.7.0/gems/digest-3.1.0 for inspection. Results logged to /var/lib/gems/2.7.0/extensions/x86_64-linux/2.7.0/digest-3.1.0/gem_make.out ```