First, partition out the system and build a filesystem tree in `/mnt`.
Then, download and run the latest `gentoostrap.sh`:
```
cd
git clone https://git.9iron.club/salt/bootstrap
sudo ./bootstrap/gentoostrap.sh
```
The script supports a fair few arguments, so it's worth looking into `gentoostrap.sh -h` if you need to customize the system.
Note that this is highly specific to my environment. Most of the configuration management is done in Ansible, but this will create a user with my own personal setup.
* By default, the repository will be cloned over SSH. Either generate some keys and add them to your remote server or change the repository URI to HTTP.