diff -ur '--exclude=CVS' '--exclude=Manifest' '--exclude=.git' '--exclude=.wh..' /usr/portage/eclass/perl-app.eclass portage/eclass/perl-app.eclass
--- portage/eclass/perl-app.eclass	2011-12-27 12:55:12.000000000 -0500
+++ portage/eclass/perl-app.eclass	2012-09-28 14:32:34.000000000 -0400
@@ -5,6 +5,7 @@
 # Author: Michael Cummings <mcummings@gentoo.org>
 # Maintained by the Perl herd <perl@gentoo.org>
 
+GENTOO_DEPEND_ON_PERL_SUBSLOT="no"
 inherit perl-module
 
 case "${EAPI:-0}" in
diff -ur '--exclude=CVS' '--exclude=Manifest' '--exclude=.git' '--exclude=.wh..' /usr/portage/eclass/perl-module.eclass portage/eclass/perl-module.eclass
--- portage/eclass/perl-module.eclass	2012-09-27 12:35:41.000000000 -0400
+++ portage/eclass/perl-module.eclass	2012-09-28 14:32:34.000000000 -0400
@@ -27,10 +27,24 @@
 			PERL_EXPF+=" pkg_postinst pkg_postrm"
 
 		case "${GENTOO_DEPEND_ON_PERL:-yes}" in
-			yes)
+		yes)
+			case "${EAPI:-0}" in
+			5)
+				case "${GENTOO_DEPEND_ON_PERL_SUBSLOT:-yes}" in
+				yes)
+					DEPEND="dev-lang/perl:=[-build]"
+					;;
+				*)
+					DEPEND="dev-lang/perl[-build]"
+					;;
+				esac
+				;;
+			*)
 				DEPEND="dev-lang/perl[-build]"
-				RDEPEND="${DEPEND}"
 				;;
+			esac
+			RDEPEND="${DEPEND}"
+			;;
 		esac
 		;;
 	*)
diff -ur '--exclude=CVS' '--exclude=Manifest' '--exclude=.git' '--exclude=.wh..' /usr/portage/eclass/xorg-2.eclass portage/eclass/xorg-2.eclass