Description of problem:
rubygem-jgrep can't be installed on EL6

Version-Release number of selected component (if applicable):
1.4.1

How reproducible:

# yum install rubygem-jgrep
Loaded plugins: versionlock
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package rubygem-jgrep.noarch 0:1.4.1-1.el6 will be installed
--> Processing Dependency: ruby(release) >= 1.8 for package: rubygem-jgrep-1.4.1-1.el6.noarch
--> Processing Dependency: rubygem(json_pure) for package: rubygem-jgrep-1.4.1-1.el6.noarch
--> Running transaction check
---> Package rubygem-jgrep.noarch 0:1.4.1-1.el6 will be installed
--> Processing Dependency: ruby(release) >= 1.8 for package: rubygem-jgrep-1.4.1-1.el6.noarch
---> Package rubygem-json_pure.noarch 0:1.6.3-2.el6 will be installed
--> Finished Dependency Resolution
Error: Package: rubygem-jgrep-1.4.1-1.el6.noarch (epel-staged)
           Requires: ruby(release) >= 1.8
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest

16/10/11 12:22:36 rack-na/fake (devel-minimal)

Steps to Reproduce:
1. boot instance of EL6.8
2. add EPEL6 repo as mentioned in https://fedoraproject.org/wiki/EPEL
3. do yum install rubygem-jgrep

Actual results:
* it failes on resolving dependencies


Expected results:
* return code is 0 and package is installed

Additional info:

Old ruby does not provide ruby(release)
# rpm -q --provides ruby
ruby = 1.8.7.374-4.el6_6
ruby(x86-64) = 1.8.7.374-4.el6_6