diff --git a/flake.nix b/flake.nix
index db7d49b..dd52c9f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,38 +1,40 @@
 {
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
   };
 
-  outputs = { self, nixpkgs, ... } @ inputs:
-    let
-      pkgs = nixpkgs.legacyPackages.x86_64-linux;
-    in
-    {
-      devShells.x86_64-linux.default = pkgs.mkShell {
-        buildInputs = [
-          (pkgs.lua5_1.withPackages (ps: with ps; [
-            ({ fetchFromGitHub, fetchurl }:
-              ps.buildLuarocksPackage {
-                pname = "cmark";
-                version = "0.30.2-1";
-                knownRockspec = (fetchurl {
-                  url = "mirror://luarocks/cmark-0.30.2-1.rockspec";
-                  sha256 = "077kvl9xa9yj0fxyyxxw43k9v9dgd5f11ax8hhxj3nx8vfs5rps8";
-                }).outPath;
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let pkgs = nixpkgs.legacyPackages.${system};
+      in with pkgs; {
+        devShells.default = mkShell {
+          buildInputs = [
+            (lua5_3.withPackages (ps:
+              with ps; [
+                (buildLuarocksPackage {
+                  pname = "cmark";
+                  version = "0.30.2-1";
+                  knownRockspec = (fetchurl {
+                    url = "mirror://luarocks/cmark-0.30.2-1.rockspec";
+                    sha256 =
+                      "077kvl9xa9yj0fxyyxxw43k9v9dgd5f11ax8hhxj3nx8vfs5rps8";
+                  }).outPath;
 
-                src = fetchFromGitHub {
-                  owner = "jgm";
-                  repo = "cmark-lua";
-                  rev = "0.30.2";
-                  hash = "sha256-6Bzq0FdyqXXiL6pLDRFbULFJpowF0P6CvAw8iqFXkkQ=";
-                };
-              })
-            luafilesystem
-            luasocket
-            luasec
-            fennel
-          ]))
-        ];
-      };
-    };
+                  src = fetchFromGitHub {
+                    owner = "jgm";
+                    repo = "cmark-lua";
+                    rev = "0.30.2";
+                    hash =
+                      "sha256-6Bzq0FdyqXXiL6pLDRFbULFJpowF0P6CvAw8iqFXkkQ=";
+                  };
+                })
+                luafilesystem
+                luasocket
+                luasec
+                fennel
+              ]))
+          ];
+        };
+      });
 }