$(1).INSTALL.ntargets =
$(1).INSTALL.args = !make @dir !extra !ntargets
- $(1).INSTALL.args.dir = -C $$(1) install
+ $(1).INSTALL.args.dir = -j 1 -C $$(1) install
$(1).INSTALL.mkdirs = $$(CONTRIB.build/)lib/ $$(CONTRIB.build/)include/
$(1).INSTALL.target = $$($(1).build/).stamp.install