diff --git a/project/extras.mk b/project/extras.mk
index 815471f..eab44c4 100644
--- a/project/extras.mk
+++ b/project/extras.mk
@@ -16,7 +16,7 @@ pyext/%$(OS_LIB_SUFFIX): LDFLAGS_SONAME =
 pyext/%$(OS_LIB_SUFFIX): LDFLAGS_DSOEXT = -Wl,-soname -Wl,$(subst pyext/,,$@)
 pyext/%$(OS_LIB_SUFFIX): LDFLAGS_DYNEXT = $(LDFLAGS_DSOEXT) $(LDFLAGS_PYEXT)
 
-pyext/%$(OS_LIB_SUFFIX):
+pyext/%$(OS_LIB_SUFFIX): $(DSO_REF_SONAME)
 	$(CC) -shared -o $@ $^ $(LDFLAGS_SHARED) $(LDFLAGS_DYNEXT) -l$(PACKAGE)