diff --git a/boot_link.js b/boot_link.js
index b9f7049..bcb51b2 100644
--- a/boot_link.js
+++ b/boot_link.js
@@ -1,14 +1,9 @@
 // boot_link.js
 const fs = require('fs')
-const { execSync } = require('child_process')
 const path = require('path')
 
 // Main function to link libraries
-const openSharePath = fs.existsSync(
-  path.resolve('./env_loc.gitomit.sfomit.json')
-)
-  ? require(path.resolve('./env_loc.gitomit.sfomit.json')).openShare
-  : ''
+const openSharePath = fs.existsSync(path.resolve('./env_loc.gitomit.sfomit.json')) ? require(path.resolve('./env_loc.gitomit.sfomit.json')).openShare : ''
 console.log('openShare:', openSharePath)
 if (!openSharePath) {
   return
@@ -18,30 +13,35 @@ const nodeModulesPath = path.resolve('./node_modules')
 console.log('nodeModulesPath:', nodeModulesPath)
 
 // Get the list of libraries
-const libs = fs
-  .readdirSync(nodeModulesPath)
-  .filter(
-    libName =>
-      libName.startsWith('wo_') ||
-      libName.startsWith('wo-') ||
-      libName === 'tic-crypto'
-  )
+const libs = fs.readdirSync(nodeModulesPath).filter((libName) => libName.startsWith('wo_') || libName.startsWith('wo-') || libName === 'tic-crypto')
 
-libs.forEach(libName => {
+libs.forEach((libName) => {
   const libPath = path.join(openSharePath, libName)
   if (fs.existsSync(libPath)) {
     console.log(`Copying ${libName}`)
-    const sourceFiles = fs
-      .readdirSync(libPath)
-      .filter(
-        fileName => fileName.endsWith('.js') || fileName.endsWith('.json')
-      )
-    sourceFiles.forEach(file => {
+    const sourceFiles = fs.readdirSync(libPath).filter((fileName) => fileName.endsWith('.js') || fileName.endsWith('.json'))
+    sourceFiles.forEach((file) => {
       const sourceFile = path.join(libPath, file)
       const tempFile = path.join(nodeModulesPath, libName, file + '.temp')
       const destFile = path.join(nodeModulesPath, libName, file)
-      fs.symlinkSync(sourceFile, tempFile, 'file')
+      // fs.symlinkSync(sourceFile, tempFile, 'file') // through symbolic links, 例如 tic-crypto 安装后，报错 tweetnacl module 找不到，因为跟着 symbolic links 去原始文件所在的位置找了。
+      try {
+        // fs.linkSync creates hard links on both Windows and Unix/Linux
+        fs.linkSync(sourceFile, tempFile)
+      } catch (err) {
+        // Fallback to copy if hard link fails
+        fs.copyFileSync(sourceFile, tempFile)
+      }
       fs.renameSync(tempFile, destFile)
     })
   }
 })
+
+/*
+script in package.json: 
+
+"boot_link.sh": "echo '=== Copy local lib to node_modules'; for LIB in $(cd node_modules && ls -d wo_* wo-* tic-crypto 2>&1); do if [ -d ../../npm/$LIB ]; then echo $LIB; ln -f $(realpath ../../npm/$LIB)/*.js ./node_modules/$LIB/; fi; done;"
+
+echo === Copy local lib to node_modules; for LIB in $(cd node_modules && ls -d wo_* wo-* tic-crypto 2>&1); do if [ -d $(jq -r .openShare env_loc.gitomit.sfomit.json)/$LIB ]; then echo copying $LIB; ln -f $(realpath $(jq -r .openShare env_loc.gitomit.sfomit.json))/$LIB/*.js ./node_modules/$LIB/; fi; done;
+
+*/