Use nix flakes for lutris

flake.lock

@@ -0,0 +1,25 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1629978322,
+        "narHash": "sha256-/yavi2HwutTmxhIP9mO5ZgjTAOPsY6W1bw4ErtoSCj8=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "e8a80426d7a42498de49139752588ccb213aebb0",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,17 @@
+{
+  description = "dotfiles";
+
+  outputs = { self, nixpkgs }:
+    let
+      pkgs = import nixpkgs
+        {
+          system = "x86_64-linux";
+          config = {
+            allowUnfree = true;
+          };
+        };
+    in
+    {
+      packages.x86_64-linux.lutris = pkgs.lutris;
+    };
+}