This is a bit experimental. There is some description of the motivation
behind this approach, as well as the downsides in the commit messages.

I don't know how to wrap binaries with the GEM_PATH, but somehow
excluding inputs specified as native-inputs, so I'd be very interested
if anyone has ideas about this.

Christopher Baines (3):
  ruby-build-system: Add wrap-ruby-program.
  ruby-build-system: Add a new wrap phase.
  gnu: Remove redundant wrapping from packages using ruby-build-system.

 gnu/packages/databases.scm       |  13 +---
 gnu/packages/ruby.scm            |  18 +-----
 guix/build/ruby-build-system.scm | 131 ++++++++++++++++++++++++++++++++++++++-
 3 files changed, 133 insertions(+), 29 deletions(-)