diff --git a/build.py b/build.py
index fffb22180..3e7ce853e 100755
--- a/build.py
+++ b/build.py
@@ -268,6 +268,9 @@ def build_flutter_arch_manjaro(version, features):
 
 def build_flutter_windows(version, features):
     os.system(f'cargo build --features {features} --lib --release')
+    if not os.path.exists("target/release/librustdesk.dll"):
+        print("cargo build failed, please check rust source code.")
+        exit(-1)
     os.chdir('flutter')
     os.system('flutter build windows --release')
     os.chdir('..')
diff --git a/src/tray.rs b/src/tray.rs
index 4f45dc7bb..10688bf5f 100644
--- a/src/tray.rs
+++ b/src/tray.rs
@@ -1,5 +1,4 @@
 use hbb_common::log::{debug, error, info};
-use lazy_static::lazy_static;
 #[cfg(target_os = "linux")]
 use libappindicator::AppIndicator;
 use std::env::temp_dir;
@@ -7,6 +6,11 @@ use std::{
     collections::HashMap,
     sync::{Arc, Mutex, RwLock},
 };
+use trayicon::{MenuBuilder, TrayIconBuilder};
+use winit::{
+    event::Event,
+    event_loop::{ControlFlow, EventLoop},
+};
 
 #[derive(Clone, Eq, PartialEq, Debug)]
 enum Events {