diff --git a/scripts/darwin_set_proxy.py b/scripts/darwin_set_proxy.py
index d06bc181..c8521bdd 100644
--- a/scripts/darwin_set_proxy.py
+++ b/scripts/darwin_set_proxy.py
@@ -4,39 +4,56 @@
                                                                                                                                                                                                                                                                                           
   https://github.com/NixOS/nix/issues/1472#issuecomment-1532955973
 """
+
 import os
 import plistlib
 import shlex
 import subprocess
 from pathlib import Path
-                                                                                                                                                                                                                                                                                          
-                                                                                                                                                                                                                                                                                          
+
+
 NIX_DAEMON_PLIST = Path("/Library/LaunchDaemons/org.nixos.nix-daemon.plist")
 NIX_DAEMON_NAME = "org.nixos.nix-daemon"
 # http proxy provided by my homelab's bypass router
-HTTP_PROXY = "http://192.168.5.103:7890"
-                                                                                                                                                                                                                                                                                          
-pl = plistlib.loads(NIX_DAEMON_PLIST.read_bytes())
-                                                                                                                                                                                                                                                                                          
-# set http/https proxy
-# NOTE: curl only accept the lowercase of `http_proxy`!
-# NOTE: https://curl.se/libcurl/c/libcurl-env.html
-# pl["EnvironmentVariables"]["http_proxy"] = HTTP_PROXY
-# pl["EnvironmentVariables"]["https_proxy"] = HTTP_PROXY
-                                                                                                                                                                                                                                                                                          
-# remove http proxy
-pl["EnvironmentVariables"].pop("http_proxy", None)
-pl["EnvironmentVariables"].pop("https_proxy", None)
-                                                                                                                                                                                                                                                                                          
-os.chmod(NIX_DAEMON_PLIST, 0o644)
-NIX_DAEMON_PLIST.write_bytes(plistlib.dumps(pl))
-os.chmod(NIX_DAEMON_PLIST, 0o444)
-                                                                                                                                                                                                                                                                                          
-# reload the plist
-for cmd in (
+HTTP_PROXY = "http://192.168.5.179:7890"
+
+PLIST = plistlib.loads(NIX_DAEMON_PLIST.read_bytes())
+
+
+def update_plist():
+    os.chmod(NIX_DAEMON_PLIST, 0o644)
+    NIX_DAEMON_PLIST.write_bytes(plistlib.dumps(PLIST))
+    os.chmod(NIX_DAEMON_PLIST, 0o444)
+
+
+def reload_daemon():
+    # reload the plist
+    for cmd in (
         f"launchctl unload {NIX_DAEMON_PLIST}",
         f"launchctl load {NIX_DAEMON_PLIST}",
-):
-    print(cmd)
-    subprocess.run(shlex.split(cmd), capture_output=False)
+    ):
+        print(cmd)
+        subprocess.run(shlex.split(cmd), capture_output=False)
 
+
+def set_proxy():
+    # set http/https proxy
+    # NOTE: curl only accept the lowercase of `http_proxy`!
+    # NOTE: https://curl.se/libcurl/c/libcurl-env.html
+    PLIST["EnvironmentVariables"]["http_proxy"] = HTTP_PROXY
+    PLIST["EnvironmentVariables"]["https_proxy"] = HTTP_PROXY
+    update_plist()
+    reload_daemon()
+
+
+def unset_proxy():
+    # remove http proxy
+    PLIST["EnvironmentVariables"].pop("http_proxy", None)
+    PLIST["EnvironmentVariables"].pop("https_proxy", None)
+    update_plist()
+    reload_daemon()
+
+
+if __name__ == "__main__":
+    set_proxy()
+    # unset_proxy()