diff --git a/Jenkinsfile b/Jenkinsfile
index bc42569..8c8b420 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -112,7 +112,14 @@ function unescapeXml(value) {
 
 function attr(attrs, name) {
   const needle = `${name}="`;
-  const start = attrs.indexOf(needle);
+  let start = attrs.indexOf(needle);
+  while (start > 0) {
+    const previous = attrs.charCodeAt(start - 1);
+    if (previous === 32 || previous === 9 || previous === 10 || previous === 13) {
+      break;
+    }
+    start = attrs.indexOf(needle, start + 1);
+  }
   if (start < 0) return '';
   const valueStart = start + needle.length;
   const valueEnd = attrs.indexOf('"', valueStart);