diff --git a/adapter/outbound/vmess.go b/adapter/outbound/vmess.go
index b8d09f45..a66ee40f 100644
--- a/adapter/outbound/vmess.go
+++ b/adapter/outbound/vmess.go
@@ -54,6 +54,7 @@ type VmessOption struct {
 	PacketAddr          bool         `proxy:"packet-addr,omitempty"`
 	XUDP                bool         `proxy:"xudp,omitempty"`
 	PacketEncoding      string       `proxy:"packet-encoding,omitempty"`
+	GlobalPadding       bool         `proxy:"global-padding,omitempty"`
 	AuthenticatedLength bool         `proxy:"authenticated-length,omitempty"`
 }
 
@@ -311,6 +312,9 @@ func (v *Vmess) SupportUOT() bool {
 func NewVmess(option VmessOption) (*Vmess, error) {
 	security := strings.ToLower(option.Cipher)
 	var options []vmess.ClientOption
+	if option.GlobalPadding {
+		options = append(options, vmess.ClientWithGlobalPadding())
+	}
 	if option.AuthenticatedLength {
 		options = append(options, vmess.ClientWithAuthenticatedLength())
 	}
diff --git a/default.nix b/default.nix
deleted file mode 100755
index 7e9eb182..00000000
--- a/default.nix
+++ /dev/null
@@ -1,34 +0,0 @@
-{ lib
-, fetchFromGitHub
-, buildGoModule
-}:
-buildGoModule rec {
-  pname = "clash-meta";
-  version = "dev";
-  src = ./.;
-  vendorSha256 = "sha256-7HjYcoqWA5gvPUc5psCgy0UTc17CBzBJ/OiGvII/iBA=";
-
-  # Do not build testing suit
-  excludedPackages = [ "./test" ];
-
-  CGO_ENABLED = 0;
-
-  ldflags = [
-    "-s"
-    "-w"
-    "-X github.com/Dreamacro/clash/constant.Version=${version}"
-  ];
-
-  # network required
-  doCheck = false;
-
-  postInstall = ''
-    mv $out/bin/clash $out/bin/clash-meta
-  '';
-
-  meta = with lib; {
-    description = "Another Clash Kernel";
-    homepage = "https://github.com/MetaCubeX/Clash.Meta";
-    license = licenses.gpl3Only;
-  };
-}
diff --git a/flake.lock b/flake.lock
index 01b81807..7da95ac3 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,11 +2,11 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1664638641,
-        "narHash": "sha256-r2gVLq9DD1A0Igv4AdkmpuuVykXmKVsJTAJinS/ZFrM=",
+        "lastModified": 1664705630,
+        "narHash": "sha256-MLi1J9tIZQFj8v9RKmG89HJAE5ja3z4ui4Tf9+wG/bM=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "cb81a9ca94e7631bc67788d858e214d56571983a",
+        "rev": "f71b215225dec75df6266ff7764d54c2e44ef226",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 3e8fd557..4afb1d53 100644
--- a/flake.nix
+++ b/flake.nix
@@ -9,19 +9,49 @@
     utils.lib.eachDefaultSystem
       (system:
         let
-          pkgs = nixpkgs.legacyPackages.${system};
+          pkgs = import nixpkgs {
+            inherit system;
+            overlays = [ self.overlay ];
+          };
         in
-        {
-          packages = rec{
-            clash-meta = pkgs.callPackage ./. { };
-            default = clash-meta;
-          };
-
-          apps = rec {
-            clash-meta = utils.lib.mkApp { drv = self.packages.${system}.clash-meta; };
-            default = clash-meta;
-          };
+        rec {
+          packages.default = pkgs.clash-meta;
         }
-      );
+      ) //
+    (
+      let version = nixpkgs.lib.substring 0 8 self.lastModifiedDate or self.lastModified or "19700101"; in
+      {
+        overlay = final: prev: {
+
+          clash-meta = final.buildGoModule {
+            pname = "clash-meta";
+            inherit version;
+            src = ./.;
+
+            vendorSha256 = "sha256-Af1RgeB6APxKW9m+rm2mkpYSXwAgFTzRyW0GJe9ML+A=";
+
+            # Do not build testing suit
+            excludedPackages = [ "./test" ];
+
+            CGO_ENABLED = 0;
+
+            ldflags = [
+              "-s"
+              "-w"
+              "-X github.com/Dreamacro/clash/constant.Version=dev-${version}"
+              "-X github.com/Dreamacro/clash/constant.BuildTime=${version}"
+            ];
+
+            # Network required 
+            doCheck = false;
+
+            postInstall = ''
+              mv $out/bin/clash $out/bin/clash-meta
+            '';
+
+          };
+        };
+      }
+    );
 }