nix-installer did not install the nix-daemon service properly.

[carsoncall]

1. Your OS (Linux, Mac) and architecture (x86_64, aarch64)
   • Fedora 40 (Sway), x86_64
2. Your nix-installer version (/nix/nix-installer --version)
   • nix-installer 0.27.0
3. The thing you tried to run (eg nix-installer)
   • curl --proto '=https' --tlsv1.2 -sSf -L https://install.determinate.systems/nix | sh -s -- install --determinate
4. What happened (the output of the command, please)
   • Not sure, was a few days ago. No sign of an error though, as far as I can tell.
5. What you expected to happen
   • I expected Nix to work out of the box.
6. If you tried to fix it, what did you try?
   • I tried updating nix by running sudo -i nix upgrade-nix, which simply output:

replacing old 'nix-2.24.9'
installing 'nix-2.24.9'
building '/nix/store/bx8csgm2db868w6dcp8sc3yl1aji393a-user-environment.drv'... 

And then hung forever.

• I tried running /nix/nix-installer repair, and it output:

INFO nix-installer v0.27.0
`nix-installer` needs to run as `root`, attempting to escalate now via `sudo`...
[sudo] password for carsoncall:
 INFO nix-installer v0.27.0
 INFO Will ensure the Nix shell profiles are still being sourced
 INFO Finished repairing successfully!

• I then tried uninstalling:

INFO nix-installer v0.27.0
`nix-installer` needs to run as `root`, attempting to escalate now via `sudo`...
 INFO nix-installer v0.27.0
 INFO nix-installer v0.27.0
Nix uninstall plan (v0.27.0)

Planner: linux

Configured settings:
* determinate_nix: true

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): y
 INFO Revert: Remove directory `/nix/temp-install-dir`
 INFO Revert: Configure the Determinate Nix daemon
 INFO Revert: Create directory `/etc/tmpfiles.d`
 INFO Revert: Install an SELinux Policy for Nix
 INFO Revert: Configure Nix
 INFO Revert: Create build users (UID 30001-30032) and group (GID 30000)
 INFO Revert: Provision Nix
 INFO Revert: Install Determinate Nixd
 INFO Revert: Create directory `/nix`
ERROR Uninstallation complete, some errors encountered
Error:
   0: Error reverting
   0: Action `configure_determinate_nixd_init_service` errored
      Remove file `/etc/systemd/system/nix-daemon.service`
   0:

Location:
   src/cli/subcommand/uninstall.rs:192

Backtrace omitted. Run with RUST_BACKTRACE=1 environment variable to display it.
Run with RUST_BACKTRACE=full to include source snippets.

Consider reporting this error using this URL: https://github.com/DeterminateSystems/nix-installer/issues/new?title=%3Cautogenerated-issue%3E&body=%23%23+Error%0A%60%60%60%0AError%3A+%0A+++0%3A+Error+reverting%0A+++0%3A+Action+%60configure_determinate_nixd_init_service%60+errored%0A++++++Remove+file+%60%2Fetc%2Fsystemd%2Fsystem%2Fnix-daemon.service%60%0A%0A%60%60%60%0A%0A%23%23+Metadata%0A%7Ckey%7Cvalue%7C%0A%7C--%7C--%7C%0A%7C**version**%7C0.27.0%7C%0A%7C**os**%7Clinux%7C%0A%7C**arch**%7Cx86_64%7C%0A

Looks like it didn't find the file... because it doesn't exist.

The issue, as far as I can tell, is the following:
Here's an excerpt from the receipt from the installation:

"action": {
        "action_name": "configure_determinate_nixd_init_service",
        "init": "Systemd",
        "configure_init_service": {
          "action": {
            "action_name": "configure_init_service",
            "init": "Systemd",
            "start_daemon": true,
            "service_src": null,
            "service_name": null,
            "service_dest": "/etc/systemd/system/nix-daemon.service",
            "socket_files": [
              {
                "name": "nix-daemon.socket",
                "src": {
                  "Literal": "[Unit]\nDescription=Determinate Nix Daemon Socket\nBefore=multi-user.target\nRequiresMountsFor=/nix/store\nRequiresMountsFor=/nix/var\nRequiresMountsFor=/nix/var/nix/db\nConditionPathIsReadWrite=/nix/var/nix/daemon-socket\n\n[Socket]\nFileDescriptorName=nix-daemon.socket\nListenStream=/nix/var/nix/daemon-socket/socket\n\n[Install]\nWantedBy=sockets.target\n"
                },
                "dest": "/etc/systemd/system/nix-daemon.socket"
              },
              {
                "name": "determinate-nixd.socket",
                "src": {
                  "Literal": "[Unit]\nDescription=Determinate Nixd Daemon Socket\nBefore=multi-user.target\nRequiresMountsFor=/nix/store\nRequiresMountsFor=/nix/var/determinate\n\n[Socket]\nFileDescriptorName=determinate-nixd.socket\nDirectoryMode=0755\nListenStream=/nix/var/determinate/determinate-nixd.socket\nService=nix-daemon.service\n\n[Install]\nWantedBy=sockets.target\n"
                },
                "dest": "/etc/systemd/system/determinate-nixd.socket"
              }
            ]
          },
          "state": "Completed"
        }
      },
      "state": "Completed"

Both of the sockets are enabled, but there does not exist any file with the path /etc/systemd/system/nix-daemon.service. As far as I can tell, the only way to be able to use Nix at all in this state is to run determinate-nixd daemon. This is not ideal. I am running SELinux in permissive mode, so it would not have interfered.

Let me know if you need any more information.