Do not use isolation in update_requirements hook unless necessary

Closes #14707

.hooks/update_requirements

@@ -2,6 +2,7 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
 
+import importlib.metadata
 import io
 import json
 import os
@@ -14,22 +15,35 @@ root = os.path.dirname(os.path.dirname(__file__))
 module_path = os.path.join(root, 'modules')
 
 dependencies = set()
-development_dependencies = {
+build_dependencies = {
+    'rnc2rng',
     'Babel',
+    'hatchling',
+    'hatch-tryton',
+    }
+development_dependencies = build_dependencies | {
     'Sphinx',
     'cookiecutter',
-    'rnc2rng',
     'sphinx-lint',
     'tox',
     }
 
 FNULL = open(os.devnull, 'w')
 
+_build_deps_installed = True
+try:
+    for requirement in build_dependencies:
+        importlib.metadata.version(Requirement(requirement).name)
+except importlib.metadata.PackageNotFoundError:
+    _build_deps_installed = False
+
 
 def add_dependencies(package):
+    cmd = 'python3 -m build -qq --metadata'
+    if _build_deps_installed:
+        cmd += ' --no-isolation'
     metadata = subprocess.check_output(
-        'python3 -m build -n -q --metadata',
+        cmd, shell=True, encoding='utf-8', cwd=package).strip()
-        shell=True, encoding='utf-8', cwd=package).strip()
     metadata = json.loads(metadata)
     for requirement in metadata.get('requires_dist', []):
         requirement = Requirement(requirement)