1 files changed, 17 insertions, 7 deletions

diff --git a/flake.nix b/flake.nix
index 8324f07..361061c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -37,31 +37,41 @@
       url = "github:nlewo/comin";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+
+    # development stuff
+    treefmt-nix = {
+      url = "github:numtide/treefmt-nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
   outputs =
     {
+      self,
       nixpkgs,
       futils,
       nix-on-droid,
+      treefmt-nix,
       ...
     }@inputs:
     futils.lib.eachSystem (
       system:
       let
-        pkgs = inputs.nixpkgs.legacyPackages.${system};
+        pkgs = import inputs.nixpkgs { inherit system; };
+        treefmtEval = treefmt-nix.lib.evalModule pkgs ./treefmt.nix;
       in
       {
         devShells.default = futils.lib.minimalMkShell pkgs {
-          buildInputs = with pkgs; [
-            git
+          packages = with pkgs; [
+            gitMinimal
             sops
-
-            # Formatting
-            treefmt
-            nixfmt-rfc-style
           ];
         };
+
+        formatter = treefmtEval.config.build.wrapper;
+        checks = {
+          formatting = treefmtEval.config.build.check self;
+        };
       }
     )
     // {