diff --git a/toolchain/gcc/final/Makefile b/toolchain/gcc/final/Makefile
index 01fec380273752d01c10046f476f785ec34b92aa..b815f677d669c8cac479d365f52449f64564637c 100644
--- a/toolchain/gcc/final/Makefile
+++ b/toolchain/gcc/final/Makefile
@@ -67,7 +67,7 @@ endef
 
 define Host/Install
 	$(CleanupToolchain)
-	$(_SINGLE)$(GCC_MAKE) -C $(GCC_BUILD_DIR) install
+	+$(GCC_MAKE) $(HOST_JOBS) -C $(GCC_BUILD_DIR) install
 	# Set up the symlinks to enable lying about target name.
 	set -e; \
 	(cd $(TOOLCHAIN_DIR); \
diff --git a/toolchain/gcc/initial/Makefile b/toolchain/gcc/initial/Makefile
index 1ed548436ea26eaa1a54ea623f9c3dd663e51299..c71b17dd87b105963987b25babbcbad539c6708f 100644
--- a/toolchain/gcc/initial/Makefile
+++ b/toolchain/gcc/initial/Makefile
@@ -18,7 +18,7 @@ define Host/Compile
 endef
 
 define Host/Install
-	$(GCC_MAKE) -C $(GCC_BUILD_DIR) \
+	+$(GCC_MAKE) $(HOST_JOBS) -C $(GCC_BUILD_DIR) \
 		prefix="$(TOOLCHAIN_DIR)/initial" \
 		install-gcc \
 		install-target-libgcc