diff --git a/scripts/jenkins-win64.bat b/scripts/jenkins-win64.bat
index 35cb4491..3e61588d 100644
--- a/scripts/jenkins-win64.bat
+++ b/scripts/jenkins-win64.bat
@@ -107,8 +107,8 @@ if NOT EXIST c:\electron-installer\signing.bat (
 call c:\electron-installer\signing.bat
 copy "WixSharpInstaller\Symphony.msi" "%targetsDir%\Experimental-%archiveName%.msi"
 
-%SystemRoot%\System32\where.exe markdown-pdf
-if NOT ERRORLEVEL 0 (
-    npm install -g markdown-pdf
+%SystemRoot%\System32\where.exe /q markdown-pdf
+if ERRORLEVEL 1 (
+    call npm install -g markdown-pdf
 )
 markdown-pdf install_instructions_win.md -o "%targetsDir%\Install-Instructions-Experimental-%archiveName%.pdf"