diff --git a/Jenkinsfile b/Jenkinsfile
index dd7c63a..08f2765 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -30,6 +30,7 @@ pipeline {
         LANG        = 'en_US.UTF-8'
         LANGUAGE    = 'en_US.UTF-8'
         LC_ALL      = 'en_US.UTF-8'
+        DEVELOPER_DIR = '/Applications/Xcode-10.app'
     }
 
     stages {