error attempting install on Fedora with existing single-user nix installation

## Error ``` Error: 0: Install failure 1: Error executing action 2: Action `configure_determinate_nixd_init_service` errored 3: Action `configure_init_service` errored 4: Failed to execute command `"systemd-tmpfiles" "--create" "--prefix=/nix/var/nix"` stdout: stderr: Detected unsafe path transition /nix (owned by efim) → /nix/var (owned by root) during canonicalization of nix/var/nix. Detected unsafe path transition /nix (owned by efim) → /nix/var (owned by root) during canonicalization of nix/var/nix. exited with status code: 73 ``` ## Metadata |key|value| |--|--| |**version**|3.16.0| |**os**|linux| |**arch**|x86_64| i rejected the revert plan that seemed to plan the deletion of nix store: ``` Installation failure, offering to revert... Nix uninstall plan (v3.16.0) Planner: linux (with default settings) Planned actions: * Remove the Determinate Nix daemon * Remove the directory `/etc/tmpfiles.d` if no other contents exists * Remove the SELinux policy for Nix * Unconfigure the shell profiles * Remove the Nix configuration in `/etc/nix/nix.conf` * Unset the default Nix profile * Remove Nix users and group * Remove the directory tree in `/nix` * Remove the Determinate Nix superpowers * Remove the directory `/nix` Proceed? ([Y]es/[n]o/[e]xplain): n ``` but now looks like previously existing nix installation is broken ``` nix --extra-experimental-features nix-command shell nixpkgs#hello -c hello warning: unknown setting 'eval-cores' warning: unknown setting 'lazy-trees' error: … This command may have been run as non-root in a single-user Nix installation, or the Nix daemon may have crashed. error: opening lock file '/nix/var/nix/db/big-lock': Permission denied ``` and i will have to do full reinstall