--- /usr/portage/net-dns/libidn/libidn-1.35.ebuild	2020-04-03 21:27:01.553848689 -0400
+++ libidn-1.35.ebuild	2020-05-15 14:06:18.235923339 -0400
@@ -60,7 +60,8 @@
 		--with-lispdir="${EPREFIX}${SITELISP}/${PN}" \
 		--with-packager-bug-reports="https://bugs.gentoo.org" \
 		--with-packager-version="r${PR}" \
-		--with-packager="Gentoo"
+		--with-packager="Gentoo" \
+		--with-javac-flags="-source 1.6 -target 1.6"
 }
 
 multilib_src_compile() {