diff --git a/build.py b/build.py
index 24f4901..18fd028 100755
--- a/build.py
+++ b/build.py
@@ -4,4 +4,4 @@ from rwx.prj.sphinx import SphinxProject
 
 
 if __name__ == "__main__":
-    SphinxProject(__file__).build()
+    return SphinxProject(__file__).build()