diff --git a/crm_usability_akretion/pyproject.toml b/crm_usability_akretion/pyproject.toml
new file mode 100644
index 0000000..4231d0c
--- /dev/null
+++ b/crm_usability_akretion/pyproject.toml
@@ -0,0 +1,3 @@
+[build-system]
+requires = ["whool"]
+build-backend = "whool.buildapi"