hiera not working as expected under vagrant

gistfile1.txt

vagrant@sf-precise-64:~$ cat /vagrant/infrastructure/vagrant/hiera.yaml
---
:backends: - yaml
           - puppet

:logger: console

:hierarchy: - environments/%{sf_environment}/%{host}
            - environments/%{sf_environment}/common
            - common
:yaml:
    :datadir: /vagrant/infrastructure/mymedsandme.com/hieradata

:puppet:
    :datasource: data

vagrant@sf-precise-64:~$ tree /vagrant/infrastructure/mymedsandme.com/hieradata
/vagrant/infrastructure/mymedsandme.com/hieradata
├── common.yaml
└── environments
    ├── live
    │   ├── common.yaml
    │   └── corebox_hostname.yaml
    ├── staging
    │   └── common.yaml
    ├── uat
    │   └── common.yaml
    └── vagrant
        └── common.yaml

5 directories, 6 files