this derivation will be built:
  /nix/store/7nr6mkff1p8h33ywba886fkxd848g9vg-treefmt-check.drv
building '/nix/store/7nr6mkff1p8h33ywba886fkxd848g9vg-treefmt-check.drv' on 'ssh-ng://customer@mac02'
building '/nix/store/7nr6mkff1p8h33ywba886fkxd848g9vg-treefmt-check.drv'
treefmt-check> treefmt v2.5.0traversed 37 files
treefmt-check> emitted 27 files for processing
treefmt-check> formatted 27 files (1 changed) in 35ms
treefmt-check>  M flake.nix
treefmt-check> diff --git a/flake.nix b/flake.nix
treefmt-check> index 8066334..bb2525d 100644
treefmt-check> --- a/flake.nix
treefmt-check> +++ b/flake.nix
treefmt-check> @@ -35,7 +35,9 @@
treefmt-check>          default = pkgs.callPackage ./nix/devshell.nix { };
treefmt-check>        });
treefmt-check>  
treefmt-check> -      formatter = forAllSystems (pkgs: treefmtEval.${pkgs.stdenv.hostPlatform.system}.config.build.wrapper);
treefmt-check> +      formatter = forAllSystems (
treefmt-check> +        pkgs: treefmtEval.${pkgs.stdenv.hostPlatform.system}.config.build.wrapper
treefmt-check> +      );
treefmt-check>  
treefmt-check>        # export every package and devshell as a check so CI builds them all
treefmt-check>        checks = forAllSystems (
error: build of '/nix/store/7nr6mkff1p8h33ywba886fkxd848g9vg-treefmt-check.drv' on 'ssh-ng://customer@mac02' failed: Cannot build '/nix/store/7nr6mkff1p8h33ywba886fkxd848g9vg-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/6h7iqv9bjpjdpsiaci71ba995sk9k4x9-treefmt-check
       Last 19 log lines:
       > treefmt v2.5.0traversed 37 files
       > emitted 27 files for processing
       > formatted 27 files (1 changed) in 35ms
       >  M flake.nix
       > diff --git a/flake.nix b/flake.nix
       > index 8066334..bb2525d 100644
       > --- a/flake.nix
       > +++ b/flake.nix
       > @@ -35,7 +35,9 @@
       >          default = pkgs.callPackage ./nix/devshell.nix { };
       >        });
       >  
       > -      formatter = forAllSystems (pkgs: treefmtEval.${pkgs.stdenv.hostPlatform.system}.config.build.wrapper);
       > +      formatter = forAllSystems (
       > +        pkgs: treefmtEval.${pkgs.stdenv.hostPlatform.system}.config.build.wrapper
       > +      );
       >  
       >        # export every package and devshell as a check so CI builds them all
       >        checks = forAllSystems (
       For full logs, run:
         nix log /nix/store/7nr6mkff1p8h33ywba886fkxd848g9vg-treefmt-check.drv
error: Cannot build '/nix/store/7nr6mkff1p8h33ywba886fkxd848g9vg-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/6h7iqv9bjpjdpsiaci71ba995sk9k4x9-treefmt-check