diff --git a/rebar b/rebar
index 1b4b2f6..f02127b 100755
Binary files a/rebar and b/rebar differ
diff --git a/rebar.config b/rebar.config
index a3da7dd..c2bbe02 100644
--- a/rebar.config
+++ b/rebar.config
@@ -1,7 +1,7 @@
 
-{so_name, "wterl.so"}.
+{port_specs, [{"priv/wterl.so", ["c_src/*.c"]}]}.
 
-{port_envs, [
+{port_env, [
              {"DRV_CFLAGS",  "$DRV_CFLAGS -Werror -I c_src/system/include"},
              {"DRV_LDFLAGS", "$DRV_LDFLAGS c_src/system/lib/libwiredtiger.a"}
             ]}.