diff --git a/index.js b/index.js
index cbd5e64f..e001a103 100644
--- a/index.js
+++ b/index.js
@@ -25,3 +25,4 @@ exports.CovCommand = require('./lib/cmd/cov');
 exports.DevCommand = require('./lib/cmd/dev');
 exports.TestCommand = require('./lib/cmd/test');
 exports.DebugCommand = require('./lib/cmd/debug');
+exports.PkgfilesCommand = require('./lib/cmd/pkgfiles');
diff --git a/lib/cmd/pkgfiles.js b/lib/cmd/pkgfiles.js
index 4997fa5b..e9984d75 100644
--- a/lib/cmd/pkgfiles.js
+++ b/lib/cmd/pkgfiles.js
@@ -3,6 +3,11 @@
 const Command = require('../command');
 
 class PkgfilesCommand extends Command {
+  constructor(rawArgv) {
+    super(rawArgv);
+    this.usage = 'Usage: egg-bin pkgfiles';
+  }
+
   get description() {
     return 'Generate pkg.files automatically';
   }
diff --git a/lib/command.js b/lib/command.js
index f4b53454..9ee86061 100644
--- a/lib/command.js
+++ b/lib/command.js
@@ -15,7 +15,7 @@ class Command extends BaseCommand {
 
     // extract execArgv to special item
     context.execArgv = this.helper.unparseArgv(argv, {
-      includes: [ 'debug', 'debug-brk', 'inspect', 'inspect-brk', 'es_staging', /^harmony.*/ ],
+      includes: [ 'debug', 'debug-brk', 'inspect', 'inspect-brk', 'es_staging', 'expose_debug_as', /^harmony.*/ ],
     });
 
     // remove unuse args
diff --git a/package.json b/package.json
index 4836c1b3..f927654b 100644
--- a/package.json
+++ b/package.json
@@ -58,9 +58,9 @@
     "node": ">= 6.0.0"
   },
   "files": [
-    "bin",
+    "index.js",
     "lib",
-    "index.js"
+    "bin"
   ],
   "ci": {
     "version": "6, 7"
diff --git a/test/my-egg-bin.test.js b/test/my-egg-bin.test.js
index 182e6a4c..fb4bf18a 100644
--- a/test/my-egg-bin.test.js
+++ b/test/my-egg-bin.test.js
@@ -59,6 +59,7 @@ describe('test/my-egg-bin.test.js', () => {
       'echo',
       '--baseDir=./dist',
       '--debug=5555', '--debug-brk',
+      '--expose_debug_as=v8debug',
       '--inspect', '6666', '--inspect-brk',
       '--es_staging', '--harmony', '--harmony_default_parameters',
     ];
@@ -66,7 +67,7 @@ describe('test/my-egg-bin.test.js', () => {
       // .debug()
       .expect('stdout', /"baseDir":".\/dist"/)
       .notExpect('stdout', /"debugBrk":true/)
-      .expect('stdout', /"execArgv":\["--debug=5555","--debug-brk","--inspect=6666","--inspect-brk","--es_staging","--harmony","--harmony_default_parameters"]/)
+      .expect('stdout', /"execArgv":\["--debug=5555","--debug-brk","--expose_debug_as=v8debug","--inspect=6666","--inspect-brk","--es_staging","--harmony","--harmony_default_parameters"]/)
       .expect('code', 0)
       .end(done);
   });