this derivation will be built:
  /nix/store/9yxm4jw5jhkwq6wy4hj6vf7v5jbx776m-treefmt-check.drv
error: build of '/nix/store/9yxm4jw5jhkwq6wy4hj6vf7v5jbx776m-treefmt-check.drv' on 'ssh-ng://customer@mac02' failed: Cannot build '/nix/store/9yxm4jw5jhkwq6wy4hj6vf7v5jbx776m-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/d4jcfi0kd5lyx4lnhsr3jbn8i49wysaf-treefmt-check
       Last 25 log lines:
       >    │       ╰──────────'
       > 71 │         │ ╭       /// refusing a VPN-protected socket a destination that routes back
       >    │         ╰────────'
       > 72 │           │ ╭     /// into the VPN). The reaction is the same for all: forget the
       >    │           ╰──────'
       > 73 │             │ ╭   /// address so the next send goes via the cold path or the TCP relay.
       >    │             ╰────'
       > 74 │               │ ╭ /// `EMSGSIZE` and `EAGAIN` are handled elsewhere and are not "this
       >    │               ╰──'
       > 75 │ ╭               │ /// address is wrong".
       >    │ │               ╰'
       > 76 │ │ ╭               pub(super) fn is_udp_unreachable_errno(e: &io::Error) -> bool {
       >    │ ╰────────────────^
       >    ·   │
       > 90 │   │               }
       >    │   ╰───────────────'
       >
       > Error: 4 error(s) found in code.
       > Help: Scan succeeded and found error level diagnostics in the codebase.
       >
       >
       > traversed 731 files
       > emitted 302 files for processing
       > formatted 27 files (0 changed) in 1.711s
       > Error: failed to finalise formatting: formatting failures detected
       For full logs, run:
         nix log /nix/store/9yxm4jw5jhkwq6wy4hj6vf7v5jbx776m-treefmt-check.drv
error: Cannot build '/nix/store/9yxm4jw5jhkwq6wy4hj6vf7v5jbx776m-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/d4jcfi0kd5lyx4lnhsr3jbn8i49wysaf-treefmt-check