this derivation will be built:
  /nix/store/6q7m6bnr8j3njb11cxxfh44a0lllpzib-treefmt-check.drv
error: Cannot build '/nix/store/6q7m6bnr8j3njb11cxxfh44a0lllpzib-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/nv621z02jsr8jcdg68ikpyghilnq06l6-treefmt-check
       Last 20 log lines:
       > diff --git a/flake.nix b/flake.nix
       > index f948b5a..779383b 100644
       > --- a/flake.nix
       > +++ b/flake.nix
       > @@ -182,12 +182,9 @@
       >            # Export all outputs as checks for nixbot
       >            checks =
       >              let
       > -              nixosMachines =
       > -                lib.mapAttrs' (name: config: lib.nameValuePair "nixos-${name}" config.config.system.build.toplevel)
       > -                  (
       > -                    (lib.filterAttrs (_: config: config.pkgs.stdenv.hostPlatform.system == system))
       > -                      inputs.self.nixosConfigurations
       > -                  );
       > +              nixosMachines = lib.mapAttrs' (name: config: lib.nameValuePair "nixos-${name}" config.config.system.build.toplevel) (
       > +                (lib.filterAttrs (_: config: config.pkgs.stdenv.hostPlatform.system == system)) inputs.self.nixosConfigurations
       > +              );
       >                packages = lib.mapAttrs' (n: lib.nameValuePair "package-${n}") self'.packages;
       >              in
       >              nixosMachines // packages;
       For full logs, run:
         nix log /nix/store/6q7m6bnr8j3njb11cxxfh44a0lllpzib-treefmt-check.drv