diff --git a/pyproject.toml b/pyproject.toml
index a62ccf8..1f02e8e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,6 +39,6 @@ plotting = ["matplotlib", "healpy"]
 Repository = "https://github.com/tianluyuan/sphere.git"
 
 [tool.setuptools.packages.find]
-exclude = ["paper*", "fig*"]
+exclude = ["paper*", "fig*", "build*"]
 
 [tool.setuptools_scm]