--- /usr/portage/dev-lang/nqp/nqp-2014.09.ebuild	2014-09-19 15:28:27.000000000 +0900
+++ ./dev-lang/nqp/nqp-2014.09.ebuild	2014-09-21 06:49:31.129903427 +0900
@@ -35,7 +35,7 @@
 	use java && myconf+="jvm,"
 	use parrot && myconf+="parrot,"
 	use moar && myconf+="moar,"
-	perl Configure.pl --backend=${myconf} --prefix=/usr || die
+	perl Configure.pl --backend=${myconf} --prefix="${EPREFIX}"/usr || die
 	# dirty hack to make dyncall not fail
 	sed -i -e 's/-Werror=missing-prototypes//' Makefile || die
 	sed -i -e 's/-Werror=missing-declarations//' Makefile || die
@@ -51,7 +51,7 @@
 }
 
 src_install() {
-	emake DESTDIR="${ED}" install || die
+	emake DESTDIR="${D}" install || die
 
 	dodoc CREDITS README.pod || die