inconsistent working directory on (re)provision with shell script

[techtonik]

The current working directory is different between vagrant up and vagrant provision commands:

Bringing machine 'default' up with 'virtualbox' provider...
==> default: Importing base box 'gratipay'...
==> default: Matching MAC address for NAT networking...
...
==> default: Machine booted and ready!
==> default: Checking for guest additions in VM...
    default: The guest additions on this VM do not match the installed version of
    default: VirtualBox! In most cases this is fine, but in rare cases it can
    default: prevent things such as shared folders from working properly. If you see
    default: shared folder errors, please make sure the guest additions within the
    default: virtual machine match the version of VirtualBox you have installed on
    default: your host and reload your VM.
    default:
    default: Guest Additions Version: 4.2.0
    default: VirtualBox Version: 4.3
==> default: Configuring and enabling network interfaces...
==> default: Mounting shared folders...
    default: /vagrant => E:/p/gratipay.com
==> default: Running provisioner: shell...
    default: Running: C:/Users/user/AppData/Local/Temp/vagrant-shell20141029-8552-k8vfqq.sh
==> default: stdin: is not a tty
==> default: Working in /home/vagrant
==> default: grep: README.md
==> default: : No such file or directory
==> default: make: *** No rule to make target `clean'.  Stop.
The SSH command responded with a non-zero exit status. Vagrant
assumes that this means the command failed. The output for this command
should be in the log above. Please read the output to determine what
went wrong.

vagrant provision

==> default: Running provisioner: shell...
    default: Running: C:/Users/user/AppData/Local/Temp/vagrant-shell20141029-4640-1xegaey.sh
==> default: stdin: is not a tty
==> default: Working in /vagrant
==> default: psql:/vagrant/scripts/create_db.sql:1: ERROR:  role "gratipay" already exists
...

using vagrant 1.6.5

[techtonik]

My fault. This provisioning script changed login dir from /home/vagrant to /vagrant https://github.com/gratipay/gratipay.com/blob/1722/scripts/vagrant-setup.sh#L6