diff --git a/flake.lock b/flake.lock
index 52811244..70d6c798 100644
--- a/flake.lock
+++ b/flake.lock
@@ -16,6 +16,23 @@
         "type": "github"
       }
     },
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib"
+      },
+      "locked": {
+        "lastModified": 1675933616,
+        "narHash": "sha256-/rczJkJHtx16IFxMmAWu5nNYcSXNg1YYXTHoGjLrLUA=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "47478a4a003e745402acf63be7f9a092d51b83d7",
+        "type": "github"
+      },
+      "original": {
+        "id": "flake-parts",
+        "type": "indirect"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1704842529,
@@ -32,44 +49,29 @@
         "type": "github"
       }
     },
-    "root": {
-      "inputs": {
-        "flake-compat": "flake-compat",
-        "nixpkgs": "nixpkgs",
-        "utils": "utils"
-      }
-    },
-    "systems": {
+    "nixpkgs-lib": {
       "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "dir": "lib",
+        "lastModified": 1675183161,
+        "narHash": "sha256-Zq8sNgAxDckpn7tJo7V1afRSk2eoVbu3OjI1QklGLNg=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "e1e1b192c1a5aab2960bf0a0bd53a2e8124fa18e",
         "type": "github"
       },
       "original": {
-        "owner": "nix-systems",
-        "repo": "default",
+        "dir": "lib",
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
         "type": "github"
       }
     },
-    "utils": {
+    "root": {
       "inputs": {
-        "systems": "systems"
-      },
-      "locked": {
-        "lastModified": 1701680307,
-        "narHash": "sha256-kAuep2h5ajznlPMD9rnQyffWG8EM/C73lejGofXvdM8=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "4022d587cbbfd70fe950c1e2083a02621806a725",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
+        "flake-compat": "flake-compat",
+        "flake-parts": "flake-parts",
+        "nixpkgs": "nixpkgs"
       }
     }
   },
diff --git a/flake.nix b/flake.nix
index c55dac3f..cb873879 100644
--- a/flake.nix
+++ b/flake.nix
@@ -2,41 +2,35 @@
   description = "Repository of Nix expressions for old PHP versions";
 
   inputs = {
-    # Shim to make flake.nix work with stable Nix.
-    flake-compat = {
-      url = "github:edolstra/flake-compat";
-      flake = false;
-    };
-
+    flake-compat.url = "github:nix-community/flake-compat";
     nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
-
-    utils.url = "github:numtide/flake-utils";
+    systems.url = "github:nix-systems/default";
   };
 
-  outputs = { self, flake-compat, nixpkgs, utils }:
-    # For each supported platform,
-    utils.lib.eachDefaultSystem (system:
-      let
-        # Let’s merge the package set from Nixpkgs with our custom PHP versions.
-        pkgs = import nixpkgs.outPath {
-          config = {
-            allowUnfree = true;
-          };
-          inherit system;
-          overlays = [
-            self.overlays.default
-          ];
-        };
-      in rec {
-        packages = {
-          inherit (pkgs) php php56 php70 php71 php72 php73 php74 php80 php81 php82 php83;
-        };
+  outputs = inputs@{ self, flake-parts, nixpkgs, systems, ... }: flake-parts.lib.mkFlake { inherit inputs; } {
+    systems = import systems;
+
+    perSystem = { self', inputs', config, pkgs, system, lib, ... }: {
+      _module.args.pkgs = import self.inputs.nixpkgs {
+        inherit system;
+        overlays = [
+          self.overlays.default
+        ];
+        config.allowUnfree = true;
+      };
 
-        checks = import ./checks.nix {
-          inherit packages pkgs system;
-        };
-      }
-    ) // {
-      overlays.default = import ./pkgs/phps.nix nixpkgs.outPath;
+      packages = {
+        inherit (pkgs) php php56 php70 php71 php72 php73 php74 php80 php81 php82 php83;
+      };
+
+      checks = import ./checks.nix {
+        inherit (self') packages;
+        inherit pkgs system;
+      };
+    };
+
+    flake = {
+      overlays.default = import ./pkgs/phps.nix nixpkgs;
     };
+  };
 }