Try making the publishes path

Change-Id: I6714ad5e3b875815342e37fd3eeaf6d224fa4e4d
diff --git a/cicd/pipelines/tasks/task_publish_unstable.jenkins b/cicd/pipelines/tasks/task_publish_unstable.jenkins
index a0b5081..a4f76f9 100644
--- a/cicd/pipelines/tasks/task_publish_unstable.jenkins
+++ b/cicd/pipelines/tasks/task_publish_unstable.jenkins
@@ -39,6 +39,7 @@
                     String stamp = date.format("yyyyMMdd-HHmmss")
 
                     sh """
+                       mkdir -p /var/lib/aptly/publishes/unstable
                        aptly snapshot merge core-full-unstable-${stamp} ${debianMirrorSnapshotName} ${coreSnapshotName}
                        aptly publish snapshot --distribution=unstable core-full-unstable-${stamp} filesystem:unstable:unstable
                        aptly publish snapshot --distribution=unstable ${bspSnapshotName} filesystem:unstable:unstable