Installation succeeds but builds entirely wrong fstab file

[solomon-b]

Describe the bug

I'm trying to setup a new laptop (Dell XPS 15). The installation succeeds but on boot the partition is not accessible:

Waiting 10 seconds for device /dev/nvme0n1p2 to appear.......... - failure
/dev/nvme0n1p2 is unavailable

I used a boot disk to investigate and the partition was totally fine. I mounted it and poked around and saw that the fstab file was totally wrong. It was identical to that of the nixos bootdisk i used during provisioning:

# This is a generated file.  Do not edit!
#
# To make changes, edit the fileSystems and swapDevices NixOS options
# in your /etc/nixos/configuration.nix file.
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>

# Filesystems.
tmpfs / tmpfs x-initrd.mount,mode=0755 0 0
/dev/root /iso auto x-initrd.mount 0 0
/iso/nix-store.squashfs /nix/.ro-store squashfs x-initrd.mount,loop 0 0
tmpfs /nix/.rw-store tmpfs x-initrd.mount,mode=0755 0 0
overlay /nix/store overlay x-initrd.mount,lowerdir=/nix/.ro-store,upperdir=/nix/.rw-store/store,workdir=/nix/.rw-store/work 0 0


# Swap devices.

To Reproduce

Steps to reproduce the behavior:

I'm not sure. My system config uses sops-nix for secrets so it would be a pain to try to instally my config on a vm or whatever to test this.

Expected behavior

System information

nixos 23.05

Additional context

This is the machine config in question:
https://github.com/solomon-b/nixos-config/blob/main/flake.nix#L223-L241

And this is a script i use to wrap nixos-anywhere:
https://github.com/solomon-b/nixos-config/blob/main/installer/install-pc.sh#L39

[solomon-b]

Closing due to user error.