diff --git a/setuptools/_vendor/_validate_pyproject/NOTICE b/setuptools/_vendor/_validate_pyproject/NOTICE
index 020083ac22..003d646f1f 100644
--- a/setuptools/_vendor/_validate_pyproject/NOTICE
+++ b/setuptools/_vendor/_validate_pyproject/NOTICE
@@ -1,7 +1,7 @@
 The code contained in this directory was automatically generated using the
 following command:
 
-    python -m validate_pyproject.vendoring --output-dir setuptools/_vendor/_validate_pyproject --enable-plugins setuptools distutils --very-verbose
+    python -m validate_pyproject.vendoring --output-dir=setuptools/_vendor/_validate_pyproject --enable-plugins setuptools distutils --very-verbose
 
 Please avoid changing it manually.
 
diff --git a/setuptools/extern/__init__.py b/setuptools/extern/__init__.py
index 0560faae18..395d58fd67 100644
--- a/setuptools/extern/__init__.py
+++ b/setuptools/extern/__init__.py
@@ -71,6 +71,6 @@ def install(self):
 
 names = (
     'packaging', 'pyparsing', 'ordered_set', 'more_itertools', 'importlib_metadata',
-    'zipp', 'importlib_resources', 'jaraco', 'tomli', '_validate_pyproject'
+    'zipp', 'importlib_resources', 'jaraco', 'tomli', '_validate_pyproject',
 )
 VendorImporter(__name__, names, 'setuptools._vendor').install()
diff --git a/tools/vendored.py b/tools/vendored.py
index 70f9104dac..de3a6fe6e8 100644
--- a/tools/vendored.py
+++ b/tools/vendored.py
@@ -1,7 +1,5 @@
-import os
 import re
 import sys
-import shutil
 import string
 import subprocess
 import venv
@@ -145,16 +143,17 @@ def install_validate_pyproject(vendor):
         opts["ignore_cleanup_errors"] = True
 
     with TemporaryDirectory(**opts) as tmp:
-        venv.create(tmp, with_pip=True)
-        path = os.pathsep.join(Path(tmp).glob("*"))
-        venv_python = shutil.which("python", path=path)
+        env_builder = venv.EnvBuilder(with_pip=True)
+        env_builder.create(tmp)
+        context = env_builder.ensure_directories(tmp)
+        venv_python = getattr(context, 'env_exec_cmd', context.env_exe)
+
         subprocess.check_call([venv_python, "-m", "pip", "install", pkg])
         cmd = [
             venv_python,
             "-m",
             "validate_pyproject.vendoring",
-            "--output-dir",
-            str(vendor / "_validate_pyproject"),
+            f"--output-dir={vendor / '_validate_pyproject' !s}",
             "--enable-plugins",
             "setuptools",
             "distutils",