--- dev-lang/spidermonkey/spidermonkey-24.2.0-r1.ebuild
+++ dev-lang/spidermonkey/spidermonkey-24.2.0-r1.ebuild
@@ -90,10 +90,12 @@
 		make CFLAGS="" CXXFLAGS="" \
 			CC=$(tc-getBUILD_CC) CXX=$(tc-getBUILD_CXX) \
 			AR=$(tc-getBUILD_AR) RANLIB=$(tc-getBUILD_RANLIB) \
+			MOZ_OPTIMIZE_FLAGS="" MOZ_DEBUG_FLAGS="" \
 			jscpucfg host_jsoplengen host_jskwgen || die
 		make CFLAGS="" CXXFLAGS="" \
 			CC=$(tc-getBUILD_CC) CXX=$(tc-getBUILD_CXX) \
 			AR=$(tc-getBUILD_AR) RANLIB=$(tc-getBUILD_RANLIB) \
+			MOZ_OPTIMIZE_FLAGS="" MOZ_DEBUG_FLAGS="" \
 			-C config nsinstall || die
 		mv {,native-}jscpucfg || die
 		mv {,native-}host_jskwgen || die
@@ -109,7 +111,7 @@
 			host_jskwgen.o \
 			host_jsoplengen.o || die
 	fi
-	emake
+	emake MOZ_OPTIMIZE_FLAGS="" MOZ_DEBUG_FLAGS=""
 }
 
 src_test() {