--- /usr/portage/dev-ruby/rdoc/rdoc-5.0.0-r2.ebuild	2016-12-26 21:16:58.000000000 +0200
+++ /usr/portage/dev-ruby/rdoc/rdoc-5.0.0-r2.ebuild	2017-01-06 22:59:17.199145667 +0200
@@ -75,7 +75,8 @@
 	for bin in rdoc ri; do
 		ruby_fakegem_binwrapper $bin /usr/bin/$bin-2
 
-		for version in 20 21 22 23; do
+		for version in ${USE_RUBY}; do
+			version=`echo ${version} | cut -c 5-`
 			if use ruby_targets_ruby${version}; then
 				ruby_fakegem_binwrapper $bin /usr/bin/${bin}${version}
 				sed -i -e "1s/env ruby/ruby${version}/" \