Apologies - mine seems to be a different problem - I am not using --addpkg ubuntu-desktop but I am getting a similar error message:
VMBuilder.exception.VMBuilderException: Process (['umount', '/tmp/tmpTuNycd/dev']) returned 1. stdout: , stderr: umount: /tmp/tmpTuNycd/dev: device is busy. (In some cases useful info about processes that use the device is found by lsof(8) or fuser(1)) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/497258 Title: vmbuilder fails when adding package 'ubuntu-desktop' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/vm-builder/+bug/497258/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs