<autogenerated-issue> nix store on external drive + weird fstab entry caused install failure?

[kbob]

I am installing nix onto a recently imaged iMac for the first time. The installer failed during "plan" because (I think) of an existing Nix Store volume on an external drive. There was no Nix Store volume on the internal drive, and I think there had never been one.

However, /etc/fstab somehow got an entry for the external drive's nix store volume. These are the first and only times I've run a nix installer from the internal drive. I did run Determinate Systems' installer, the nixos.org installer, and the nix-darwin installer (more than once) while booted from the external drive.

Full terminal transcript with annotations is attached.

Terminal Saved Output - Annotated.txt

Error

Error: 
   0: Install failure
   1: Error executing action
   2: Action `create_nix_volume` errored
   3: Action `encrypt_apfs_volume` errored
   4: Failed to execute command with status 1 `"/usr/sbin/diskutil" "mount" "Nix Store"`, stdout: 
      stderr: Volume on disk1s7 failed to mount

Metadata

key	value
version	0.23.0
os	macos
arch	x86_64