On Fri,  8 Feb 2019 19:56:41 +0000
Christopher Baines <mail@cbaines.net> wrote:

> This is helpful as it displays more information about what gem
> install is doing, especially for packages with native extensions.
> 
> * guix/build/ruby-build-system.scm (install): Add --verbose to gem
> install command. ---

LGTM.