diff --git a/toolchain/gcc/final/Makefile b/toolchain/gcc/final/Makefile
index 01fec38027..b815f677d6 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 1ed548436e..c71b17dd87 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