Spin up a Genesis Cloud CPU instance and transform it with nixos-infect into a NixOS system. (example for nixos.wiki)

gc-nixos-infect-via-startup_script.sh

#!/usr/bin/env nix-shell
#! nix-shell -p jq -p bash -i bash

# Notes:
# Replace <MY TOKEN> with your API token
# Replace <NICKNAME> with the nickname of your instance
# Replace <HOSTNAME> with the hostname of your instance
# `vcpu-8_memory-16g_disk-80g` indicates the instance type; See https://developers.genesiscloud.com/instances#instance-types for details
# `6d5c3613-f6cb-48e1-8711-14f084060209` is the ID for the current default Ubuntu 16.04 image. Image IDs can be queried via the API: https://developers.genesiscloud.com/images#list-images
# `2b7ab082-e9f2-40f0-a410-a6337b6a6d42` is the ID for my previosly configured SSH pubkey. Key IDs can be queried via the API: https://developers.genesiscloud.com/ssh-keys#list-ssh-keys

# Create a new instance, unmount /boot to avoid issues with nixos-infect, run nixos-infect and reboot into the new system if successful
# During the nixos-infect process, you can SSH to the instance using the username `ubuntu` and the selected SSH key.
# After a successful nixos-infect run, the instance will reboot and you can log on via SSH using the username `root` and the same SSH key as before.
curl --request POST 'https://api.genesiscloud.com/compute/v1/instances' \
  -H 'X-Auth-Token: <MY TOKEN>' \
  -H 'Content-Type: application/json' \
  --data-raw '
  {
    "name": "<NICKNAME>",
    "hostname": "<HOSTNAME>",
    "type": "vcpu-8_memory-16g_disk-80g",
    "image": "6d5c3613-f6cb-48e1-8711-14f084060209",
    "ssh_keys": ["2b7ab082-e9f2-40f0-a410-a6337b6a6d42"],
    "metadata":{
      "startup_script":"#!/bin/bash\numount -l /boot & curl https://raw.githubusercontent.com/elitak/nixos-infect/master/nixos-infect | NIX_CHANNEL=nixos-unstable bash 2>&1 | tee /tmp/infect.log\n"
    }
  }' | jq '.'