Comment 4 for bug 1597522

I can verify that the build in xenial-proposed resolves this bug using the example config attached.

Running an installation using curtin packed on a system with the current curtin release in xenial-updates installation fails.
Curtin release:
  root@tmp:/tmp# apt-cache policy curtin
  curtin:
    Installed: 0.1.0~bzr399-0ubuntu1~16.04.1
    Candidate: 0.1.0~bzr399-0ubuntu1~16.04.1
Failure:
  Unexpected error while running command.
  Command: ['mkfs.xfs', '-s', '1', '-f', '/dev/vdb2']
  Exit code: 1
  Reason: -
  Stdout: ''
  Stderr: 'unknown option -s 1\nUsage: mkfs.xfs\n/* blocksize */\t\t[-b log=n|size
  ...

When curtin is packed with the release in proposed, installation works

Curtin release:
  curtin:
    Installed: 0.1.0~bzr425-0ubuntu1~16.04.1
    Candidate: 0.1.0~bzr425-0ubuntu1~16.04.1