This update for ruby2.1 fixes the following issues:
{ "binaries": [ { "ruby2.1-stdlib": "2.1.9-19.6.1", "ruby2.1": "2.1.9-19.6.1", "libruby2_1-2_1": "2.1.9-19.6.1" } ] }
{ "binaries": [ { "ruby2.1-devel": "2.1.9-19.6.1" } ] }