General steps to install NixOS with the config

1. Boot NixOS iso and connect to internet
2. Use lsblk to find the correct device. likely sda or nvme0n1
3. sgdisk --zap-all <disk> -> THIS MURDERS THINGS!
4. Use ls -l /dev/disk/by-id/ to find the correct device id
5. DISK=/dev/disk/by-id/<id>
6. Create boot partition with sgdisk -n 0:0:+1GiB -t 0:EF00 -c 0:boot $DISK
7. Create swap partition with sgdisk -n 0:0:+20GiB -t 0:8200 -c 0:swap $DISK. You likely want the size to be at least 2x ram for hibernate. Because of ZRam, potentially you could be using much more ram.
8. Create ZFS partition with sgdisk -n 0:0:0 -t 0:BF01 -c 0:ZFS $DISK
9. Save new variables with BOOT=$DISK-part1;SWAP=$DISK-part2;ZFS=$DISK-part3
10. Set pool name variable PNAME=<name>
11. Create zpool with zpool create -o ashift=12 -O mountpoint=none -O atime=off -O compression=lz4 -O xattr=sa -O acltype=posixacl -o altroot="/mnt" $PNAME $ZFS
12. Create datasets with

zfs create -o mountpoint=none $PNAME/local
zfs create -o mountpoint=none $PNAME/safe
zfs create -o mountpoint=legacy $PNAME/local/root
zfs create -o mountpoint=legacy $PNAME/local/var
zfs create -o mountpoint=legacy $PNAME/local/nix
zfs create -o mountpoint=legacy $PNAME/safe/home
zfs create -o mountpoint=legacy $PNAME/safe/nixconfig
zfs create -o refreservation=1G -o mountpoint=none $PNAME/reserved

12. Play with recordsize if you want with zfs set recordsize=32k $PNAME
13. Enable snapshots for safe with zfs set com.sun:auto-snapshot=true $PNAME/safe
14. Allow zfs permissions from user zfs allow -u bren077s create,compression,destroy,snapshot,snapdir,hold,mount,mountpoint,send,rename,receive,quota,refquota NotTim
15. Enable trim with zfs set autotrim=on $PNAME
16. Mount everything zfs with

mount -t zfs $PNAME/local/root /mnt
mkdir /mnt/var
mount -t zfs $PNAME/local/var /mnt/var
mkdir /mnt/nix
mount -t zfs $PNAME/local/nix /mnt/nix
mkdir /mnt/home
mount -t zfs $PNAME/safe/home /mnt/home
mkdir -p /mnt/etc/nixos
mount -t zfs $PNAME/safe/nixconfig /mnt/etc/nixos

17. Setup boot with

mkfs.vfat $BOOT
mkdir /mnt/boot
mount $BOOT /mnt/boot

18. Setup swap with

mkswap -L swap $SWAP
swapon $SWAP

20. Setup tmpfs with

mkdir /mnt/tmp
mount -t tmpfs none /mnt/tmp

19. Generate the config with nixos-generate-config --root /mnt
20. Double check /etc/nixos/hardware-configuration.nix using the referecence hardware-configuration.nix
21. Copy over all files except hardware-configuration.nix
22. Maybe change the host id to head -c 8 /etc/machine-id
23. nixos-install and reboot