diff --git a/Tools/buildbot/build.bat b/Tools/buildbot/build.bat
index aa019a9..00bbdbb 100644
--- a/Tools/buildbot/build.bat
+++ b/Tools/buildbot/build.bat
@@ -1,3 +1,3 @@
 @rem Used by the buildbot "compile" step.
 call "%VS71COMNTOOLS%vsvars32.bat"
-devenv.com /build Debug PCbuild\pcbuild.sln
+devenv.com /useenv /build Debug PCbuild\pcbuild.sln