diff --git a/Makefile b/Makefile
index 3cbd10a1..77ef4945 100644
--- a/Makefile
+++ b/Makefile
@@ -47,19 +47,19 @@ gc:
 ############################################################################
 
 darwin-set-proxy:
-	echo "skip setting proxy, use global proxy instead"
-	# sudo python3 scripts/darwin_set_proxy.py
+	sudo python3 scripts/darwin_set_proxy.py
+	sleep 1
 
 ha: darwin-set-proxy
 	nix build .#darwinConfigurations.harmonica.system
 	./result/sw/bin/darwin-rebuild switch --flake .
-	sleep 3
+	sleep 1
 	sudo chmod 644 /etc/agenix/alias-for-work.*
 
 ha-debug: darwin-set-proxy
 	nix build .#darwinConfigurations.harmonica.system --show-trace --verbose
 	./result/sw/bin/darwin-rebuild switch --flake .#harmonica --show-trace --verbose
-	sleep 3
+	sleep 1
 	sudo chmod 644 /etc/agenix/alias-for-work.*
 
 ############################################################################
diff --git a/home/base/desktop/development.nix b/home/base/desktop/development.nix
index 952ee91b..5a96c1ea 100644
--- a/home/base/desktop/development.nix
+++ b/home/base/desktop/development.nix
@@ -41,6 +41,9 @@
     # embedded development
     minicom
 
+    # ai related
+    python311Packages.huggingface-hub # huggingface-cli
+
     # misc
     pkgs-unstable.devbox
     glow # markdown previewer
diff --git a/modules/common.nix b/modules/common.nix
index efccabcd..f8ba2580 100644
--- a/modules/common.nix
+++ b/modules/common.nix
@@ -1,4 +1,5 @@
 {
+  pkgs,
   lib,
   username,
   ...
@@ -29,11 +30,23 @@
   };
 
   # do garbage collection weekly to keep disk usage low
-  nix.gc = {
-    automatic = lib.mkDefault true;
-    dates = lib.mkDefault "weekly";
-    options = lib.mkDefault "--delete-older-than 7d";
-  };
+  nix.gc =
+    {
+      automatic = lib.mkDefault true;
+      options = lib.mkDefault "--delete-older-than 7d";
+    }
+    // (
+      if pkgs.stdenv.isLinux
+      then {
+        dates = lib.mkDefault "weekly";
+      }
+      else {
+        # nix-darwin
+        interval = {
+          Hour = 24;
+        };
+      }
+    );
 
   # Allow unfree packages
   nixpkgs.config.allowUnfree = lib.mkDefault false;