Flakes aren't real. flakes can't hurt you

flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1720418205,
+        "narHash": "sha256-cPJoFPXU44GlhWg4pUk9oUPqurPlCFZ11ZQPk21GTPU=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "655a58a72a6601292512670343087c2d75d859c1",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -1,5 +1,21 @@
 {
-  outputs = { self, ... }: {
+  description = "my overlay";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+
+  outputs = { self, nixpkgs }:
+    let
+      system = "x86_64-linux";
+      pkgs = import nixpkgs {
+        inherit system;
+        overlays = [
+          self.overlays.default
+        ];
+      };
+    in
+    {
       overlays.default = final: prev: {
         modules = {
           matrix-alertmanager-receiver = import ./modules/matrix-alertmanager-receiver.nix;