diff --git a/Jenkinsfile b/Jenkinsfile
index 5cd513ef..47acd4f2 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -156,7 +156,7 @@ PY
         script {
           env.FLUX_BRANCH = sh(
             returnStdout: true,
-            script: "awk '/branch:/{print \\$2; exit}' clusters/atlas/flux-system/gotk-sync.yaml"
+            script: "grep -m1 '^\\s*branch:' clusters/atlas/flux-system/gotk-sync.yaml | sed 's/^\\s*branch:\\s*//'"
           ).trim()
           if (!env.FLUX_BRANCH) {
             error('Flux branch not found in gotk-sync.yaml')