swap out systems for flake-utils

flake.lock

@@ -18,6 +18,24 @@
         "type": "github"
       }
     },
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1705309234,
+        "narHash": "sha256-uNRRNRKmJyCRC/8y1RqBkqWBLM034y4qN7EprSdmgyA=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "1ef2e671c3b0c19053962c07dbda38332dcebf26",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
     "haskell-flake": {
       "locked": {
         "lastModified": 1708536395,
@@ -70,9 +88,10 @@
     "root": {
       "inputs": {
         "flake-parts": "flake-parts",
+        "flake-utils": "flake-utils",
         "haskell-flake": "haskell-flake",
         "nixpkgs": "nixpkgs",
-        "systems": "systems",
+        "systems": "systems_2",
         "treefmt-nix": "treefmt-nix"
       }
     },
@@ -91,6 +110,21 @@
         "type": "github"
       }
     },
+    "systems_2": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
     "treefmt-nix": {
       "inputs": {
         "nixpkgs": [

flake.nix

@@ -3,6 +3,7 @@
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
     systems.url = "github:nix-systems/default";
+    flake-utils.url = "github:numtide/flake-utils";
     flake-parts.url = "github:hercules-ci/flake-parts";
     haskell-flake.url = "github:srid/haskell-flake";
     treefmt-nix.url = "github:numtide/treefmt-nix";
@@ -11,7 +12,7 @@
 
   outputs = inputs:
     inputs.flake-parts.lib.mkFlake { inherit inputs; } {
-      systems = import inputs.systems;
+      systems = inputs.flake-utils.lib.defaultSystems;
       imports = [
         inputs.haskell-flake.flakeModule
         inputs.treefmt-nix.flakeModule