Uninstalling fails to restore the system's zshrc and zshenv

[grahamc]

After installing and uninstalling nix-darwin today, it looks like nix-darwin removed the zshenv and the standard zshrc file from /etc, but then doesn't restore them:

[130] grahamc@Grahams-MacBook-Pro> ls /etc/zsh*
/etc/zshenv.before-nix-darwin  /etc/zshrc.before-nix-darwin  /etc/zshrc_Apple_Terminal

which leaves the user in a semi-broken Nix and terminal state.

[nick-kadutskyi]

I have the same problem and didn't get my /etc/zshenv, /etc/zshrc, /etc/nix/nix.config restored.

During installation I got:

❯ nix run nix-darwin -- switch --flake ~/.config/nix-darwin
warning: creating lock file '/Users/nick/.config/nix-darwin/flake.lock':
• Added input 'nix-darwin':
    'github:LnL7/nix-darwin/36524adc31566655f2f4d55ad6b875fb5c1a4083' (2024-03-30)
• Added input 'nix-darwin/nixpkgs':
    follows 'nixpkgs'
• Added input 'nixpkgs':
    'github:NixOS/nixpkgs/692ceb334b4fd60d61798dde895f6f122110f5fe' (2024-04-13)
building the system configuration...
Password:
setting up /run via /etc/synthetic.conf...
error: Unexpected files in /etc, aborting activation
The following files have unrecognized content and would be overwritten:

  /etc/zshenv

Please check there is nothing critical in these files, rename them by adding .before-nix-darwin to the end, and then try again.

I moved /etc/zshenv to /etc/zshen.before-nix-darwin and then rerun installation:

❯ nix run nix-darwin -- switch --flake ~/.config/nix-darwin
building the system configuration...
user defaults...
setting up user launchd services...
setting up /Applications/Nix Apps...
setting up pam...
applying patches...
setting up /etc...
system defaults...
setting up launchd services...
creating service org.nixos.activate-system
reloading service org.nixos.nix-daemon
reloading nix-daemon...
waiting for nix-daemon
waiting for nix-daemon
configuring networking...
setting nvram variables...

I checked those zsh* files and see that /etc/zshrc got renamed to /etc/zshrc.before-nix-darwin automatically.

After that I ran uninstall script:

❯ darwin-uninstaller

Uninstalling nix-darwin, this will:

    - remove /Applications/Nix Apps symlink
    - cleanup static /etc files
    - disable and remove all launchd services managed by nix-darwin
    - restore daemon service from nix installer (only when this is a multi-user install)

Proceed? [y/n] y
user defaults...
setting up user launchd services...
Password:
setting up /Applications/Nix Apps...
setting up pam...
applying patches...
setting up /etc...
system defaults...
setting up launchd services...
removing service org.nixos.activate-system
removing service org.nixos.nix-daemon
configuring networking...
setting nvram variables...
rm: cannot remove '/Library/LaunchDaemons/org.nixos.nix-daemon.plist': No such file or directory
grep: /etc/bashrc: No such file or directory
Found no nix-daemon.sh reference in /etc/bashrc
add this snippet back to /etc/bashrc:

    # Nix
    if [ -e '/nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh' ]; then
      . '/nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh'
    fi
    # End Nix


NOTE: The /nix/var/nix/profiles/system* profiles still exist and won't be garbage collected.

Done!

*.before-nix-darwin did not get restored and now the nix and other stuff gets broken.

I don't know if I have the right expectation though that it should restore those files automatically.

Also it renamed and then didn't restore /etc/nix/nix.config which I caught by chance.