Jenkins-bin currently depends on >=virtual/jdk-1.5. I use it with jre (oracle-jre-bin) and it works just fine. Would it be possible to allow for virtual/jre || virtual/jdk?
+ 28 Oct 2014; Tony Vroon <chainsaw@gentoo.org> jenkins-bin-1.565.3-r1.ebuild, + jenkins-bin-1.586-r1.ebuild: + Relax JDK/JRE dependency as suggested by Tomas Mozes in bug #527184.