hildon-application-manager 2.2.72 connected to 9775cc1 f-39a2-4db1-8faf-91fbe668adfe apt-worker: Can't remove /var/cache/apt/archives/lock: Is a directory E: Could not open lock file /var/cache/apt/archives/lock - open (21 is a directory) E: Unable to lock the download directory ----- Installing qflipclock 1.1.0 apt-worker: free space (/)=72720384 apt-worker: Can't remove /var/cache/apt/archives/lock: Is a directory E: Could not open lock file E: Could not open lock file /var/cache/apt/archives/lock - open (21 is a directory) E: Unable to lock the download directory