`generate_state` loads `nixpkgs.lib` for the state-schema eval via
`builtins.getFlake "$NOMARCHY_REPO"`. On the live ISO that path is a
symlink chain (/etc/nomarchy -> /etc/static/nomarchy -> /nix/store/…-source),
and Nix 2.31+ rejects getFlake on a symlink ("path '…-source' is a
symlink"), aborting every real-hardware install right after hardware
config generation — single or multi disk.
Resolve the repo to its real store directory with `realpath` at
detection so getFlake receives a plain directory. The dev-checkout
branch already used realpath, so only the live-ISO path was affected.
Reproduced and fixed in a live VM (Nix 2.31.4).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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