ERROR:  Error installing sqlint:
        ERROR: Failed to build gem native extension.

    current directory: /usr/lib/ruby/gems/3.1.0/gems/google-protobuf-3.19.4/ext/google/protobuf_c
/usr/bin/ruby -I /usr/lib/ruby/site_ruby/3.1.0 -r ./siteconf20220315-2813-1j3x1i.rb extconf.rb
<internal:/usr/lib/ruby/site_ruby/3.1.0/rubygems/core_ext/kernel_require.rb>:85:in `require': cannot load such file -- mkmf (LoadError)
        from <internal:/usr/lib/ruby/site_ruby/3.1.0/rubygems/core_ext/kernel_require.rb>:85:in `require'
        from extconf.rb:3:in `<main>'

extconf failed, exit code 1

Gem files will remain installed in /usr/lib/ruby/gems/3.1.0/gems/google-protobuf-3.19.4 for inspection.
Results logged to /usr/lib/ruby/gems/3.1.0/extensions/x86_64-linux/3.1.0/google-protobuf-3.19.4/gem_make.out