this derivation will be built:
  /nix/store/skhd0828jrs2xd55fmpylpnnpdprvrb7-treefmt-check.drv
error: Cannot build '/nix/store/skhd0828jrs2xd55fmpylpnnpdprvrb7-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/3p73v20qfgkxcfr8l1jkh37c03xydcby-treefmt-check
       Last 20 log lines:
       > treefmt v2.5.0traversed 747 files
       > emitted 513 files for processing
       > formatted 513 files (1 changed) in 4.026s
       >  M hosts/mali/borgbackup-server.nix
       > diff --git a/hosts/mali/borgbackup-server.nix b/hosts/mali/borgbackup-server.nix
       > index c1a63b8..1022821 100644
       > --- a/hosts/mali/borgbackup-server.nix
       > +++ b/hosts/mali/borgbackup-server.nix
       > @@ -10,7 +10,10 @@ let
       >  in
       >  {
       >    # Preserve port 22 for existing clients; bypass Tailscale SSH on port 2222.
       > -  services.openssh.ports = [ 22 2222 ];
       > +  services.openssh.ports = [
       > +    22
       > +    2222
       > +  ];
       >    modules.services.sshd.openFirewall = false;
       >    networking.firewall.allowedTCPPorts = [ 22 ];
       >    networking.firewall.interfaces.tailscale0.allowedTCPPorts = [ 2222 ];
       For full logs, run:
         nix log /nix/store/skhd0828jrs2xd55fmpylpnnpdprvrb7-treefmt-check.drv