Add flake, module

flake.nix

@@ -4,13 +4,8 @@
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
   };
 
-  outputs = {
-    flake-parts,
-    nixpkgs,
-    self,
-    ...
-  } @ inputs:
-    flake-parts.lib.mkFlake {inherit inputs;} {
+  outputs = inputs:
+    inputs.flake-parts.lib.mkFlake {inherit inputs;} {
       systems = ["x86_64-linux" "aarch64-linux"];
       perSystem = {
         lib,
@@ -18,7 +13,7 @@
         system,
         ...
       }: {
-        _module.args.pkgs = import nixpkgs {inherit system;};
+        _module.args.pkgs = import inputs.nixpkgs {inherit system;};
 
         devShells.default = pkgs.mkShell {
           buildInputs = with pkgs; [just dart oauth2c watchexec];
@@ -30,7 +25,9 @@
           src = ./.;
 
           dartConfigHook = "packageRun build_runner build";
-          autoPubspecLock = ./pubspec.lock;
+          pubspecLock = lib.importJSON ./pubspec.lock.json;
+
+          preInstall = "set -x";
 
           meta = {
             homepage = "https://git.federated.nexus/Henry-Hiles/matrixoidc";
@@ -40,6 +37,8 @@
             maintainers = [lib.maintainers.quadradical];
           };
         };
+
+        flake.nixosModules.default = import ./module.nix;
       };
     };
 }