diff --git a/pyproject.toml b/pyproject.toml
index 5a2f1500..e3caeee9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -38,8 +38,8 @@ requires = [
 ]
 build-backend = "setuptools.build_meta"
 
-[tool.setuptools]
-packages = ["ebcc"]
+[tool.setuptools.packages.find]
+include = ["ebcc*"]
 
 [project.optional-dependencies]
 numpy = []