diff --git a/build.zig b/build.zig
index 11c21ca..ae032e2 100644
--- a/build.zig
+++ b/build.zig
@@ -47,7 +47,7 @@ test "stack version check" {
 pub fn build(b: *std.build.Builder) !void {
     const assets = std.build.Pkg{
         .name = "assets",
-        .path = .{ .path = "assets/assets.zig" },
+        .source = .{ .path = "assets/assets.zig" },
     };
 
     const zig_version = @import("builtin").zig_version;
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..59f195c
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,92 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1656928814,
+        "narHash": "sha256-RIFfgBuKz6Hp89yRr7+NR5tzIAbn52h8vT6vXkYjZoM=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "7e2a3b3dfd9af950a856d66b0a7d01e3c18aa249",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "flake-utils_2": {
+      "locked": {
+        "lastModified": 1629481132,
+        "narHash": "sha256-JHgasjPR0/J1J3DRm4KxM4zTyAj4IOJY8vIl75v/kPI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "997f7efcb746a9c140ce1f13c72263189225f482",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1659254610,
+        "narHash": "sha256-ee5W5MLWZ3kdx5hwOUs6trOJit+GeTDfG+Lg3rANKoc=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "67f49b2a3854e8b5e3f9df4422225daa0985f451",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1631288242,
+        "narHash": "sha256-sXm4KiKs7qSIf5oTAmrlsEvBW193sFj+tKYVirBaXz0=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "0e24c87754430cb6ad2f8c8c8021b29834a8845e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs",
+        "zig": "zig"
+      }
+    },
+    "zig": {
+      "inputs": {
+        "flake-utils": "flake-utils_2",
+        "nixpkgs": "nixpkgs_2"
+      },
+      "locked": {
+        "lastModified": 1659315496,
+        "narHash": "sha256-d2UFb31bF2hJrJ4Rp0JCDK1hCuw0Em08OR1cbLbmkNA=",
+        "owner": "arqv",
+        "repo": "zig-overlay",
+        "rev": "b991fe45280c45695c81b0cc6824e3c532a2ec56",
+        "type": "github"
+      },
+      "original": {
+        "owner": "arqv",
+        "repo": "zig-overlay",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..d747893
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,25 @@
+{
+  description = "A very basic flake";
+
+  inputs = {
+    flake-utils.url = "github:numtide/flake-utils";
+    zig.url = "github:arqv/zig-overlay";
+  };
+
+  outputs = { self, nixpkgs, zig, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+      in
+      {
+
+        # nix develop
+        devShells.default = pkgs.mkShell {
+          buildInputs = [
+            zig.packages.${system}.master.latest
+            pkgs.butler
+          ];
+        };
+
+      });
+}