treefmt need not be in shell PATH

README.md

@@ -21,7 +21,7 @@ For details, see: https://srid.ca/haskell-template/start
 
 - Run `nix flake update` to update all flake inputs.
 - Run `nix --option sandbox false build .#check -L` to run the flake checks.
-- Run `treefmt` in nix shell to autoformat the project. This uses [treefmt](https://github.com/numtide/treefmt), which uses `./treefmt.toml` (where fourmolu and nixpkgs-fmt are specified).
+- Run `, fmt` in nix shell to autoformat the project. This uses [treefmt](https://github.com/numtide/treefmt), which uses `./treefmt.toml` (where fourmolu and nixpkgs-fmt are specified).
 - Run `, docs` to start Hoogle with packages in your cabal file.
 - Run the application without installing: `nix run github:srid/haskell-template` (or `nix run .` from checkout)
 - Common workflows

flake.nix

@@ -22,10 +22,7 @@
           packages = {
             haskell-template.root = ./.;
           };
-          buildTools = hp: {
-            inherit (pkgs)
-              treefmt;
-          } // config.treefmt.formatters;
+          buildTools = hp: { } // config.treefmt.formatters;
           # overrides = self: super: {}
           hlsCheck.enable = true;
           hlintCheck.enable = true;
@@ -54,9 +51,9 @@
             category = "Dev Tools";
           };
           fmt = {
-            description = "Auto-format the source tree";
-            command = "treefmt";
-            category = "Dev Tools";
+            description = "Format the source tree";
+            command = "${lib.getExe pkgs.treefmt}";
+            category = "Dev Tools ";
           };
           run = {
             description = "Run the project with ghcid auto-recompile";
@@ -72,5 +69,3 @@
       };
     };
 }
-
-