--- a/setup.py.orig	2020-09-21 03:13:16.000000000 +0800
+++ b/setup.py	2020-09-21 08:45:04.518954820 +0800
@@ -18,13 +18,13 @@
         'pytest',
         'pytest-asyncio; python_version >= "3.4"',
         'pytest-trio; python_version >= "3.7"',
-        'trio; python_version > "3.6"',
-        'twisted'
-    ],
-    setup_requires=[
         'pytest-runner',
         'vcversioner'
     ],
+    setup_requires=[
+        'trio; python_version > "3.6"',
+        'twisted'
+    ],
     include_package_data=True,
 
     description="A port of node.js's EventEmitter to python.",