diff --git a/pyproject.toml b/pyproject.toml
index d185f07..e3f3155 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,6 +2,10 @@
 requires = ["uv_build>=0.8.17,<0.9.0"]
 build-backend = "uv_build"
 
+[tool.uv.build-backend]
+module-root = "src"
+module-name = ["kai", "ra"]
+
 [project]
 name = "kai"
 version = "0.1.0"