diff --git a/build.py b/build.py
index 64e8245..3e40d11 100644
--- a/build.py
+++ b/build.py
@@ -3,5 +3,6 @@
 
 if __name__ == "__main__":
     builder = ConanMultiPackager()
+    builder.build_policy = "missing"
     builder.add_common_builds()
     builder.run()