diff --git a/win_toolchain/package_from_installed.py b/win_toolchain/package_from_installed.py
index e0a3ff262..a178864a1 100644
--- a/win_toolchain/package_from_installed.py
+++ b/win_toolchain/package_from_installed.py
@@ -183,6 +183,8 @@ def GenerateSetEnvCmd(target_dir):
     f.write('@echo off\n'
             ':: Generated by win_toolchain\\package_from_installed.py.\n'
             # Common to x86 and x64
+            'set VSINSTALLDIR=%~dp0..\\..\\\n'
+            'set VCINSTALLDIR=%~dp0..\\..\\VC\\\n'
             'set PATH=%~dp0..\\..\\Common7\\IDE;%PATH%\n'
             'set INCLUDE=%~dp0..\\..\\win_sdk\\Include\\WINVERSION\\um;'
                '%~dp0..\\..\\win_sdk\\Include\\WINVERSION\\shared;'