diff --git a/gen-config.py b/gen-config.py
index 8fdbc2a8a..813684c66 100755
--- a/gen-config.py
+++ b/gen-config.py
@@ -1,8 +1,10 @@
-#!/usr/bin/env python
+#!./kitty/launcher/kitty +launch
 # License: GPLv3 Copyright: 2021, Kovid Goyal <kovid at kovidgoyal.net>
 
 
+import os
 import re
+import sys
 from typing import List
 
 from kitty.conf.generate import write_output
@@ -22,6 +24,9 @@ def patch_color_list(path: str, colors: List[str], name: str, spc: str = '    ')
 
 
 def main() -> None:
+    if 'prewarmed' in getattr(sys, 'kitty_run_data'):
+        os.environ.pop('KITTY_PREWARM_SOCKET')
+        os.execlp(sys.executable, sys.executable, '+launch', __file__, *sys.argv[1:])
     from kitty.options.definition import definition
     write_output('kitty', definition)
     nullable_colors = []