diff --git a/Jenkinsfile b/Jenkinsfile
index d3b5c212e2..256e17e419 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -112,6 +112,12 @@ pipeline {
                 sh 'cat reports/warnings.txt > /var/www/papermar.io/html/reports/warnings.txt'
             }
         }
+        stage('Build (shift US)') {
+            steps {
+                sh './configure --shift us'
+                sh 'ninja'
+            }
+        }
     }
     post {
         always {
diff --git a/tools/splat_ext/pm_sbn.py b/tools/splat_ext/pm_sbn.py
index 385b4e8d8f..665db01825 100644
--- a/tools/splat_ext/pm_sbn.py
+++ b/tools/splat_ext/pm_sbn.py
@@ -540,7 +540,7 @@ if splat_loaded:
             data = rom_bytes[self.rom_start : self.rom_end]
 
             if dir.exists():
-                raise Exception(f"SBN directory {dir} already exists")
+                self.warn(f"SBN directory {dir} already exists")
 
             sbn = SBN()
             byte_count = sbn.decode(data)