--- games-strategy/0ad/0ad-0.0.23b_alpha.ebuild
+++ games-strategy/0ad/0ad-0.0.23b_alpha.ebuild
@@ -22,6 +22,7 @@
 RESTRICT="test"
 
 RDEPEND="
+	dev-lang/spidermonkey:38
 	dev-libs/boost:=
 	dev-libs/icu:=
 	dev-libs/libsodium
@@ -63,6 +64,7 @@
 	local myconf=(
 		--with-system-nvtt
 		--with-system-miniupnpc
+		--with-system-mozjs38
 		--minimal-flags
 		$(usex nvtt "" "--without-nvtt")
 		$(usex pch "" "--without-pch")
@@ -100,15 +102,12 @@
 src_compile() {
 	tc-export AR
 
-	# build bundled and patched spidermonkey
-	cd libraries/source/spidermonkey || die
-	JOBS="${MAKEOPTS}" ./build.sh || die
-	cd "${S}" || die
-
 	# build 3rd party fcollada
 	emake -C libraries/source/fcollada/src
 
 	# build 0ad
+	CFLAGS="${CFLAGS} -I/usr/include/mozjs-38/"
+	CXXFLAGS="${CXXFLAGS} -I/usr/include/mozjs-38/"
 	emake -C build/workspaces/gcc verbose=1
 }
 
@@ -126,7 +125,6 @@
 
 	exeinto /usr/$(get_libdir)/${PN}
 	doexe binaries/system/libCollada.so
-	doexe libraries/source/spidermonkey/lib/*.so
 	use editor && doexe binaries/system/libAtlasUI.so
 
 	dodoc binaries/system/readme.txt