From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Thompson, David" <dthompson2@worcester.edu>
Subject: Re: [PATCH] Add yaggo.
Date: Wed, 24 Jun 2015 08:19:55 -0400
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To: Ben Woodcroft <b.woodcroft@uq.edu.au>
Cc: "guix-devel@gnu.org" <guix-devel@gnu.org>

On Wed, Jun 24, 2015 at 12:35 AM, Ben Woodcroft <b.woodcroft@uq.edu.au> wrote:
> Actually, I lie, this patch only sort of works. The issue is that it only
> works when a ruby package is also installed, GEM_PATH does not get set as
> part of the ruby-build-system for yaggo. The lib/ files are copied to what I
> gather is the correct place, but the env isn't right.
>
> The same also appears to be true of other ruby packages e.g. ruby-hoe:

This is the expected, correct behavior.  The native search path
$GEM_PATH is defined in the ruby package, like so:

    (native-search-paths
         (list (search-path-specification
                (variable "GEM_PATH")
               (files (list (string-append "lib/ruby/gems/"
                                            (version-major+minor version)
                                            ".0"))))))

Thus, you need ruby to be a part of your profile.  Perhaps ruby should
be a propagated input for packages with ruby executables, or scripts
could be wrapped in another script that set the correct environment
variables.

- Dave