diff --git a/pyproject.toml b/pyproject.toml
index b738dc847ff9705c5769673db7415f2eb9a75f4d..d69b43c895da603b870e581d57965178aa597643 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-    requires = ["setuptools", "wheel", "bob.extension"]
+    requires = ["setuptools", "wheel"]
     build-backend = "setuptools.build_meta"
 
 [tool.isort]