* gnu/packages/ruby.scm (ruby-mkmf-lite): Update to 0.5.2. [arguments]: Avoid the rubocop dependency. [native-inputs]: Add ruby-rspec.
* gnu/packages/ruby.scm (ruby-mkmf-lite): Update to 0.5.2. [arguments]: Avoid the rubocop dependency. [native-inputs]: Add ruby-rspec.