FIX: generation versions

setup.py

@@ -9,14 +9,13 @@ class APIGenBuild(build_py):
     def run(self):
         build_versions = ['3.0', '3.1', '3.2']
         default_version = '3.2'
+        environ = os.environ.copy()
         for version in build_versions:
             target_dir = os.path.join(self.build_lib, 'netdb_client', f"api{version.replace('.', '')}")
             self.mkpath(target_dir)
-            environ = os.environ.copy()
             environ['NETDB_VERSION'] = version
             subprocess.run(['net-api-generator', 'python', f'--output-dir={target_dir}'], check=True, env=environ)
         target_dir = os.path.join(self.build_lib, 'netdb_client')
-        environ = os.environ.copy()
         environ['NETDB_VERSION'] = default_version
         subprocess.run(['net-api-generator', 'python', f'--output-dir={target_dir}'], check=True, env=environ)
         build_py.run(self)