The symlink in the home directory points into the nix store and will get stale over time.
$ ls -lah .config/systemd/user/auto-fix-vscode-server.service
lrwxrwxrwx sandro users 110 B Tue Nov 1 17:38:07 2022 .config/systemd/user/auto-fix-vscode-server.service ⇒ /nix/store/dq7agb0d9x6z71425nk2qy24c67r40hh-unit-auto-fix-vscode-server.service/auto-fix-vscode-server.service
This can be fixed with ln -sf /run/current-system/etc/systemd/user/auto-fix-vscode-server.service ~/.config/systemd/user/auto-fix-vscode-server.service to always point the service to the current generation.
The symlink in the home directory points into the nix store and will get stale over time.
This can be fixed with
ln -sf /run/current-system/etc/systemd/user/auto-fix-vscode-server.service ~/.config/systemd/user/auto-fix-vscode-server.service
to always point the service to the current generation.