diff --git a/rebar.config b/rebar.config
index 5119e26..17ef4ff 100644
--- a/rebar.config
+++ b/rebar.config
@@ -1,10 +1,12 @@
 {erl_opts, [debug_info, warnings_as_errors]}.
 
-{port_envs,
+{port_env,
  [{"DRV_LDFLAGS","deps/zeromq2/src/.libs/libzmq.a -shared $ERL_LDFLAGS -lstdc++ -luuid"},
   {"darwin", "DRV_LDFLAGS", "deps/zeromq2/src/.libs/libzmq.a -bundle -flat_namespace -undefined suppress $ERL_LDFLAGS"},
   {"netbsd", "DRV_LDFLAGS", "deps/zeromq2/src/.libs/libzmq.a -shared $ERL_LDFLAGS -lstdc++"},
   {"DRV_CFLAGS","-Ic_src -Ideps/zeromq2/include -g -Wall -fPIC $ERL_CFLAGS"}]}.
 
+{port_specs, [{"priv/erlzmq_drv.so", ["c_src/*.c"]}]}.
+
 {pre_hooks,[{compile,"make -C c_src"},
             {clean, "make -C c_src clean"}]}.