diff --git a/lib/commands/pack.js b/lib/commands/pack.js
index 60d98a5..2c5f440 100644
--- a/lib/commands/pack.js
+++ b/lib/commands/pack.js
@@ -327,8 +327,11 @@ exports.run = function (options) {
         var sourceMapPath = sysPath.join(this.cwd, typeof this.sourceMap === 'string' ? this.sourceMap : '.source-map');
 
         var outputPath = config.output.path;
-        fs.ensureDirSync(sourceMapPath);
-        UtilFs.deleteFolderRecursive(sourceMapPath);
+        if (fs.existsSync(sourceMapPath)) {
+            UtilFs.deleteFolderRecursive(sourceMapPath, true);
+        } else {
+            fs.ensureDirSync(sourceMapPath);
+        }
         recursiveMove(outputPath, sourceMapPath);
 
         function recursiveMove(assetPath, distPath) {
diff --git a/package.json b/package.json
index 8886dea..75304e1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ykit",
-  "version": "2.3.0-rc.0",
+  "version": "2.3.0-rc.1",
   "description": "现代 JavaScript 应用构建工具",
   "bin": {
     "ykit": "bin/ykit"
diff --git a/src/commands/pack.js b/src/commands/pack.js
index dc5efc1..5acb4ab 100644
--- a/src/commands/pack.js
+++ b/src/commands/pack.js
@@ -284,8 +284,11 @@ exports.run = function(options) {
         );
 
         const outputPath = config.output.path;
-        fs.ensureDirSync(sourceMapPath);
-        UtilFs.deleteFolderRecursive(sourceMapPath);
+        if (fs.existsSync(sourceMapPath)) {
+            UtilFs.deleteFolderRecursive(sourceMapPath, true);
+        } else {
+            fs.ensureDirSync(sourceMapPath);
+        }
         recursiveMove(outputPath, sourceMapPath);
 
         function recursiveMove(assetPath, distPath) {