14/18: gnu: ruby-json-pure: Fix build failure.

[Tobias Geerinckx-Rice]

nckx pushed a commit to branch master
in repository guix.

commit 0c9f73cd23f3cd5af2ea9076048bd7ea557b69c3
Author: Tobias Geerinckx-Rice <address@hidden>
Date:   Sun Dec 24 15:45:12 2017 +0100

    gnu: ruby-json-pure: Fix build failure.
    
    * gnu/packages/ruby.scm (ruby-json-pure)[native-inputs]: Add ragel.
---
 gnu/packages/ruby.scm | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/gnu/packages/ruby.scm b/gnu/packages/ruby.scm
index 28636fa..827295c 100644
--- a/gnu/packages/ruby.scm
+++ b/gnu/packages/ruby.scm
@@ -2631,8 +2631,9 @@ a native C extension.")
              (zero? (system* "rake" "gemspec")))))))
     (native-inputs
      `(("bundler" ,bundler)
-       ("ruby-test-unit" ,ruby-test-unit)
-       ("ruby-simplecov" ,ruby-simplecov)))
+       ("ragel" ,ragel)
+       ("ruby-simplecov" ,ruby-simplecov)
+       ("ruby-test-unit" ,ruby-test-unit)))
     (synopsis "JSON implementation in pure Ruby")
     (description
      "This package provides a JSON implementation written in pure Ruby.")