diff --git a/vcbuild.bat b/vcbuild.bat
index 01750a4a004819..58594bdf612c26 100644
--- a/vcbuild.bat
+++ b/vcbuild.bat
@@ -187,9 +187,11 @@ echo Project files generated.
 if defined nobuild goto sign
 
 @rem Build the sln with msbuild.
+set "msbcpu=/m:2"
+if "%NUMBER_OF_PROCESSORS%"=="1" set "msbcpu=/m:1"
 set "msbplatform=Win32"
 if "%target_arch%"=="x64" set "msbplatform=x64"
-msbuild node.sln /m /t:%target% /p:Configuration=%config% /p:Platform=%msbplatform% /clp:NoSummary;NoItemAndPropertyList;Verbosity=minimal /nologo
+msbuild node.sln %msbcpu% /t:%target% /p:Configuration=%config% /p:Platform=%msbplatform% /clp:NoSummary;NoItemAndPropertyList;Verbosity=minimal /nologo
 if errorlevel 1 goto exit
 if "%target%" == "Clean" goto exit