MacOS – How to get automount and sshfs (osxfuse) working with yosemite

I'm currently trying to get Apple's automount working with osxfuse and sshfs.
The result should be that a specified folder gets automatically mounted if it is used.

What I've done so far:

• installed osxfuse and sshfs from the official packages
  (versions are osxfuse: 2.7.3 / sshfs 2.5.0)
• created a symlink /sbin/mount_sshfs -> /usr/local/bin/sshfs
• appended the following config line to /etc/auto_master : /- auto_ssh -nosuid

• created the /etc/auto_ssh config file:

  /mnt -fstype=sshfs,sshfs_debug,allow_other,idmap=user,follow_symlinks,max_read=65536,rw,nodev,cache=no,IdentityFile=/Users/myUsername/.ssh/sshfs remoteUser@remoteHost:/path/to/folder
  

• afterwards reload automount via : sudo automount -cv

If I now try to cd into mnt i get the following error:

bash: cd: /mnt: Operation not permitted

The console contains the following:

04/12/14 01:27:50,418 automountd[1965]: MOUNT  REQUEST: name=/mnt [] map=auto_ssh opts=nosuid path=/mnt direct=1
04/12/14 01:27:50,631 KernelEventAgent[69]: tid 54485244 received event(s) VQ_DEAD (32)
04/12/14 01:27:50,632 automountd[1965]: MOUNT  REPLY  : status=1, AUTOFS_DONE
04/12/14 01:27:50,632 automountd[1965]: mount of /mnt failed: Operation not permitted

Does anyone have any idea how to make this work, or what to try next?