diff --git a/Jenkins/Phabricator-windows-pipeline/Jenkinsfile b/Jenkins/Phabricator-windows-pipeline/Jenkinsfile
index 3831703..05552e3 100644
--- a/Jenkins/Phabricator-windows-pipeline/Jenkinsfile
+++ b/Jenkins/Phabricator-windows-pipeline/Jenkinsfile
@@ -48,7 +48,8 @@ pipeline {
                 echo "getting llvm-project... "
                 dir("llvm-project")
                 {
-                    bat "rd /s/q build"
+                    bat ""
+                    bat 'if exist "build" rd /s/q "build"'
                     git url: 'https://github.com/llvm/llvm-project.git'
                 }
                 powershell "New-Item -ItemType Directory -Force -Path ${RESULT_DIR}"