diff --git a/pyproject.toml b/pyproject.toml
index 4a500eccdf2dee25a973ab1687b7c428ed888423..9bfd2cd29cd1051971633b9093f06aec92836f8b 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.tox]