Incompatibility with mesos 1.2

/usr/libexec/mesos/mesos-containerizer launch --help
Usage: launch [options]

  --[no-]help                      Prints this help message (default: false)
  --launch_info=VALUE              
  --namespace_mnt_target=VALUE     The target 'pid' of the process whose mount namespace we'd like
                                   to enter before executing the command.
  --pipe_read=VALUE                The read end of the control pipe. This is a file descriptor 
                                   on Posix, or a handle on Windows. It's caller's responsibility 
                                   to make sure the file descriptor or the handle is inherited 
                                   properly in the subprocess. It's used to synchronize with the 
                                   parent process. If not specified, no synchronization will happen.
  --pipe_write=VALUE               The write end of the control pipe. This is a file descriptor 
                                   on Posix, or a handle on Windows. It's caller's responsibility 
                                   to make sure the file descriptor or the handle is inherited 
                                   properly in the subprocess. It's used to synchronize with the 
                                   parent process. If not specified, no synchronization will happen.
  --runtime_directory=VALUE        The runtime directory for the container (used for checkpointing)
  --[no-]unshare_namespace_mnt     Whether to launch the command in a new mount namespace. (default: false)

/usr/libexec/mesos/mesos-containerizer launch --help
Usage: launch [options]

  --capabilities=VALUE             Capabilities the command can use.
  --command=VALUE                  The command to execute.
  --environment=VALUE              The environment variables for the command.
  --[no-]help                      Prints this help message (default: false)
  --pipe_read=VALUE                The read end of the control pipe. This is a file descriptor 
                                   on Posix, or a handle on Windows. It's caller's responsibility 
                                   to make sure the file descriptor or the handle is inherited 
                                   properly in the subprocess. It's used to synchronize with the 
                                   parent process. If not specified, no synchronization will happen.
  --pipe_write=VALUE               The write end of the control pipe. This is a file descriptor 
                                   on Posix, or a handle on Windows. It's caller's responsibility 
                                   to make sure the file descriptor or the handle is inherited 
                                   properly in the subprocess. It's used to synchronize with the 
                                   parent process. If not specified, no synchronization will happen.
  --pre_exec_commands=VALUE        The additional preparation commands to execute before
                                   executing the command.
  --rootfs=VALUE                   Absolute path to the container root filesystem. The command will be 
                                   interpreted relative to this path
  --runtime_directory=VALUE        The runtime directory for the container (used for checkpointing)
  --[no-]unshare_namespace_mnt     Whether to launch the command in a new mount namespace. (default: false)
  --user=VALUE                     The user to change to.
  --working_directory=VALUE        The working directory for the command. It has to be an absolute path 
                                   w.r.t. the root filesystem used for the command.

Failed to parse the flags: Failed to load unknown flag 'command'