-EXTRA_DIST += lib/vswitch-idl.ann
-VSWITCH_IDL_FILES = vswitchd/vswitch.ovsschema lib/vswitch-idl.ann
-lib/vswitch-idl.ovsidl: $(VSWITCH_IDL_FILES)
+EXTRA_DIST += $(srcdir)/lib/vswitch-idl.ann
+VSWITCH_IDL_FILES = vswitchd/vswitch.ovsschema $(srcdir)/lib/vswitch-idl.ann
+$(srcdir)/lib/vswitch-idl.ovsidl: $(VSWITCH_IDL_FILES)