diff --git a/flake.lock b/flake.lock
index f276e28b..79f919d0 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,59 +1,22 @@
 {
   "nodes": {
-    "flake-utils": {
-      "inputs": {
-        "systems": "systems"
-      },
-      "locked": {
-        "lastModified": 1731533236,
-        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1771008912,
-        "narHash": "sha256-gf2AmWVTs8lEq7z/3ZAsgnZDhWIckkb+ZnAo5RzSxJg=",
-        "owner": "nixos",
-        "repo": "nixpkgs",
-        "rev": "a82ccc39b39b621151d6732718e3e250109076fa",
-        "type": "github"
+        "lastModified": 1771923393,
+        "narHash": "sha256-lJiQtL47xYV37Vod9KgPS7dmi1x51A5+chJE48qKimw=",
+        "rev": "ea7f1f06811ce7fcc81d6c6fd4213150c23edcf2",
+        "type": "tarball",
+        "url": "https://releases.nixos.org/nixpkgs/nixpkgs-26.05pre953762.ea7f1f06811c/nixexprs.tar.xz"
       },
       "original": {
-        "owner": "nixos",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
+        "type": "tarball",
+        "url": "https://channels.nixos.org/nixpkgs-unstable/nixexprs.tar.xz"
       }
     },
     "root": {
       "inputs": {
-        "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs"
       }
-    },
-    "systems": {
-      "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-systems",
-        "repo": "default",
-        "type": "github"
-      }
     }
   },
   "root": "root",
diff --git a/flake.nix b/flake.nix
index 1fd90153..77c5089a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,22 +1,20 @@
 {
   description = "Nix flake for skim development";
 
-  inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
-    flake-utils.url = "github:numtide/flake-utils";
-  };
+  inputs.nixpkgs.url = "https://channels.nixos.org/nixpkgs-unstable/nixexprs.tar.xz";
 
-  outputs = {
-    self,
-    nixpkgs,
-    flake-utils,
-  }:
-    flake-utils.lib.eachDefaultSystem (
-      system: let
-        pkgs = nixpkgs.legacyPackages.${system};
-      in {
-        devShells.default = pkgs.mkShell {
-          packages = with pkgs; [
+  outputs =
+    inputs:
+    let
+      inherit (inputs.nixpkgs) lib;
+      systems = lib.systems.flakeExposed;
+      eachSystem = lib.genAttrs systems;
+      pkgsFor = inputs.nixpkgs.legacyPackages;
+    in
+    {
+      devShells = eachSystem (system: {
+        default = pkgsFor.${system}.mkShellNoCC {
+          packages = with pkgsFor.${system}; [
             cargo-nextest
             cargo-insta
             cargo-llvm-cov
@@ -28,6 +26,8 @@
             hyperfine
           ];
         };
-      }
-    );
+      });
+
+      formatter = eachSystem (system: pkgsFor.${system}.nixfmt);
+    };
 }