diff --git a/multiarch-container.yaml b/multiarch-container.yaml
index 69cc021..8b465a7 100644
--- a/multiarch-container.yaml
+++ b/multiarch-container.yaml
@@ -6,7 +6,7 @@ name: build-{{ $plat.os }}-{{ $plat.arch }}
 
 trigger:
   event: [ push ]
-  branch: [ master ]
+  branch: [ {{ if $.input.build_branches -}}{{ range $.input.build_branches }}{{ . }}, {{ end }}{{ else }}master{{- end }} ]
 
 steps:
 - name: build