diff --git a/tools/build_addons.py b/tools/build_addons.py
index 8e445be5116c62..db948ba7b908e8 100755
--- a/tools/build_addons.py
+++ b/tools/build_addons.py
@@ -38,7 +38,7 @@ def rebuild_addons(args):
 
   # Copy node.lib.
   if args.is_win:
-    node_lib_dir = os.path.join(headers_dir, 'Release')
+    node_lib_dir = os.path.join(headers_dir, args.config)
     os.makedirs(node_lib_dir)
     shutil.copy2(os.path.join(args.out_dir, 'node.lib'),
                  os.path.join(node_lib_dir, 'node.lib'))
@@ -89,17 +89,17 @@ def node_gyp_rebuild(test_dir):
     executor.map(node_gyp_rebuild, test_dirs)
 
 def get_default_out_dir(args):
-  default_out_dir = os.path.join('out', 'Release')
+  default_out_dir = os.path.join('out', args.config)
   if not args.is_win:
     # POSIX platforms only have one out dir.
     return default_out_dir
   # On Windows depending on the args of GYP and configure script, the out dir
-  # could be 'out/Release' or just 'Release'.
+  # could be 'out/Release', 'out/Debug' or just 'Release' or 'Debug'.
   if os.path.exists(default_out_dir):
     return default_out_dir
-  if os.path.exists('Release'):
-    return 'Release'
-  raise RuntimeError('Can not find out dir, did you run configure?')
+  if os.path.exists(args.config):
+    return args.config
+  raise RuntimeError('Cannot find out dir, did you run build?')
 
 def main():
   if sys.platform == 'cygwin':
@@ -124,6 +124,8 @@ def main():
                       default='deps/npm/node_modules/node-gyp/bin/node-gyp.js')
   parser.add_argument('--is-win', help='build for Windows target',
                       action='store_true', default=(sys.platform == 'win32'))
+  parser.add_argument('--config', help='build config (Release or Debug)',
+                      default='Release')
   args, unknown_args = parser.parse_known_args()
 
   if not args.out_dir:
diff --git a/vcbuild.bat b/vcbuild.bat
index 7b117aa2f9ba40..6ec27b88b21578 100644
--- a/vcbuild.bat
+++ b/vcbuild.bat
@@ -583,7 +583,7 @@ for /d %%F in (test\addons\??_*) do (
 if %errorlevel% neq 0 exit /b %errorlevel%
 :: building addons
 setlocal
-python "%~dp0tools\build_addons.py" "%~dp0test\addons"
+python "%~dp0tools\build_addons.py" "%~dp0test\addons" --config %config%
 if errorlevel 1 exit /b 1
 endlocal
 
@@ -600,7 +600,7 @@ for /d %%F in (test\js-native-api\??_*) do (
 )
 :: building js-native-api
 setlocal
-python "%~dp0tools\build_addons.py" "%~dp0test\js-native-api"
+python "%~dp0tools\build_addons.py" "%~dp0test\js-native-api" --config %config%
 if errorlevel 1 exit /b 1
 endlocal
 goto build-node-api-tests
@@ -618,7 +618,7 @@ for /d %%F in (test\node-api\??_*) do (
 )
 :: building node-api
 setlocal
-python "%~dp0tools\build_addons.py" "%~dp0test\node-api"
+python "%~dp0tools\build_addons.py" "%~dp0test\node-api" --config %config%
 if errorlevel 1 exit /b 1
 endlocal
 goto run-tests