From f3a65436999a3f69ee0b73e5039b3311f63c7caa Mon Sep 17 00:00:00 2001
From: Stefan Kreutz <mail@skreutz.com>
Date: Fri, 19 Apr 2024 00:43:28 +0200
Subject: Use flake-utils

---
 flake.lock | 22 ++++++++++++++++++++--
 flake.nix  | 25 ++++++++++++-------------
 2 files changed, 32 insertions(+), 15 deletions(-)

diff --git a/flake.lock b/flake.lock
index 7d29dda..f3856ec 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,5 +1,23 @@
 {
   "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1710146030,
+        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1713248628,
@@ -18,8 +36,8 @@
     },
     "root": {
       "inputs": {
-        "nixpkgs": "nixpkgs",
-        "systems": "systems"
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
       }
     },
     "systems": {
diff --git a/flake.nix b/flake.nix
index 386b141..73a59bc 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,21 +1,20 @@
-# Derived from https://github.com/ryantm/agenix/blob/1381a759b205dff7a6818733118d02253340fd5e/flake.nix
-
 {
   description = "A temporary PostgreSQL server";
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
-    systems.url = "github:nix-systems/default";
+    flake-utils.url = "github:numtide/flake-utils";
   };
 
-  outputs = { self, nixpkgs, systems }:
-  let
-    eachSystem = nixpkgs.lib.genAttrs (import systems);
-  in {
-    overlays.default = import ./overlay.nix;
-    packages = eachSystem (system: {
-      temp-postgres = nixpkgs.legacyPackages.${system}.callPackage ./temp-postgres.nix {};
-      default = self.packages.${system}.temp-postgres;
-    });
-  };
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let pkgs = nixpkgs.legacyPackages.${system};
+      in {
+        overlays.default = import ./overlay.nix;
+        packages = {
+          temp-postgres = pkgs.callPackage ./temp-postgres.nix {};
+          default = self.packages.${system}.temp-postgres;
+        };
+      }
+    );
 }
-- 
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