diff --git a/pkgs/development/python-modules/bootstrapped-pip/default.nix b/pkgs/development/python-modules/bootstrapped-pip/default.nix
index d2cefade9c44..a83cfc02849d 100644
--- a/pkgs/development/python-modules/bootstrapped-pip/default.nix
+++ b/pkgs/development/python-modules/bootstrapped-pip/default.nix
@@ -55,6 +55,7 @@ stdenv.mkDerivation rec {
 
     echo "Building pip wheel..."
     pushd pip
+    rm pyproject.toml
     ${python.pythonForBuild.interpreter} -m pip install --no-build-isolation --no-index --prefix=$out  --ignore-installed --no-dependencies --no-cache .
     popd
   '';