diff --git a/flake.nix b/flake.nix
index 6d73dbe..b00ca33 100644
--- a/flake.nix
+++ b/flake.nix
@@ -17,40 +17,39 @@
     , crane
     , rust-overlay
     }:
-    flake-utils.lib.eachSystem [ "x86_64-linux" ]
-      (system:
-      let
-        overlays = [
-          haskellNix.overlay
-          (final: _prev: {
-            hixProject =
-              final.haskell-nix.hix.project {
-                src = ./.;
-                evalSystem = "x86_64-linux";
-              };
-          })
-          (import rust-overlay)
+    flake-utils.lib.eachSystem [ "x86_64-linux" ] (system:
+    let
+      overlays = [
+        haskellNix.overlay
+        (final: _prev: {
+          hixProject =
+            final.haskell-nix.hix.project {
+              src = ./.;
+              evalSystem = "x86_64-linux";
+            };
+        })
+        (import rust-overlay)
+      ];
+      pkgs = import nixpkgs { inherit system overlays; inherit (haskellNix) config; };
+      haskell = pkgs.hixProject.flake { };
+      rust = (crane.mkLib pkgs).overrideToolchain (p: p.rust-bin.selectLatestNightlyWith (
+        toolchain: toolchain.default.override {
+          extensions = [ "rust-src" ];
+          targets = [ "x86_64-unknown-linux-gnu" ];
+        }
+      ));
+    in
+    {
+      devShells.default = pkgs.mkShell {
+        inputsFrom = [
+          haskell.devShells.default
+          (rust.devShell { })
         ];
-        pkgs = import nixpkgs { inherit system overlays; inherit (haskellNix) config; };
-        haskell = pkgs.hixProject.flake { };
-        rust = (crane.mkLib pkgs).overrideToolchain (p: p.rust-bin.selectLatestNightlyWith (
-          toolchain: toolchain.default.override {
-            extensions = [ "rust-src" ];
-            targets = [ "x86_64-unknown-linux-gnu" ];
-          }
-        ));
-      in
-      {
-        devShells.default = pkgs.mkShell {
-          inputsFrom = [
-            haskell.devShells.default
-            (rust.devShell { })
-          ];
-        };
-        packages = {
-          haskell = haskell.packages."aoc:exe:aoc";
-          rust = rust.buildPackage { src = rust.cleanCargoSource ./rust; };
-        };
-      }
-      );
+      };
+      packages = {
+        haskell = haskell.packages."aoc:exe:aoc";
+        rust = rust.buildPackage { src = rust.cleanCargoSource ./rust; };
+      };
+    }
+    );
 }