diff --git a/flake.nix b/flake.nix
index f658948b2..c1b1bcb17 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,45 +1,50 @@
 {
   description = "Unified hosts file with base extensions.";
-  inputs.flake-utils.url = "github:numtide/flake-utils";
-  outputs = { self, nixpkgs, flake-utils }: {
-    nixosModule = { config, ... }:
-      with nixpkgs.lib;
-      let
-        cfg = config.networking.stevenBlackHosts;
-        alternatesList = (if cfg.blockFakenews then [ "fakenews" ] else []) ++
-                         (if cfg.blockGambling then [ "gambling" ] else []) ++
-                         (if cfg.blockPorn then [ "porn" ] else []) ++
-                         (if cfg.blockSocial then [ "social" ] else []);
-        alternatesPath = "alternates/" + builtins.concatStringsSep "-" alternatesList + "/";
-      in
-      {
-        options.networking.stevenBlackHosts = {
-          enable = mkEnableOption "Use Steven Black's hosts file as extra hosts.";
-          blockFakenews = mkEnableOption "Additionally block fakenews hosts.";
-          blockGambling = mkEnableOption "Additionally block gambling hosts.";
-          blockPorn = mkEnableOption "Additionally block porn hosts.";
-          blockSocial = mkEnableOption "Additionally block social hosts.";
+  outputs = { self, nixpkgs, ... }@inputs:
+    let
+      forAllSystems = nixpkgs.lib.genAttrs nixpkgs.lib.platforms.unix;
+
+      nixpkgsFor = forAllSystems (system: import nixpkgs {
+        inherit system;
+      });
+    in
+    {
+      nixosModule = { config, ... }:
+        with nixpkgs.lib;
+        let
+          cfg = config.networking.stevenBlackHosts;
+          alternatesList = (if cfg.blockFakenews then [ "fakenews" ] else []) ++
+                           (if cfg.blockGambling then [ "gambling" ] else []) ++
+                           (if cfg.blockPorn then [ "porn" ] else []) ++
+                           (if cfg.blockSocial then [ "social" ] else []);
+          alternatesPath = "alternates/" + builtins.concatStringsSep "-" alternatesList + "/";
+        in
+        {
+          options.networking.stevenBlackHosts = {
+            enable = mkEnableOption "Use Steven Black's hosts file as extra hosts.";
+            blockFakenews = mkEnableOption "Additionally block fakenews hosts.";
+            blockGambling = mkEnableOption "Additionally block gambling hosts.";
+            blockPorn = mkEnableOption "Additionally block porn hosts.";
+            blockSocial = mkEnableOption "Additionally block social hosts.";
+          };
+          config = mkIf cfg.enable {
+            networking.extraHosts =
+              builtins.readFile (
+                "${self}/" + (if alternatesList != [] then alternatesPath else "") + "hosts"
+              );
+          };
         };
-        config = mkIf cfg.enable {
-          networking.extraHosts =
-            builtins.readFile (
-              "${self}/" + (if alternatesList != [] then alternatesPath else "") + "hosts"
-            );
-        };
-      };
-  } // flake-utils.lib.eachDefaultSystem
-    (system:
-      let
-        pkgs = nixpkgs.legacyPackages.${system};
-      in
-      {
-        devShell = pkgs.mkShell {
-          buildInputs = with pkgs; [
-            python3
-            python3Packages.flake8
-            python3Packages.requests
-          ];
-        };
-      }
-    );
+
+      devShells = forAllSystems (system:
+        let pkgs = nixpkgsFor.${system}; in
+        {
+          default = pkgs.mkShell {
+            buildInputs = with pkgs; [
+              python3
+              python3Packages.flake8
+              python3Packages.requests
+            ];
+          };
+        });
+    };
 }