init nix tooling

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: I6a6a6964a17ac94c2a40f0fd34f339a965abfc9a

flake.nix

@@ -0,0 +1,22 @@
+{
+  description = "Wayland Wallpaper Daemon";
+
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs?ref?nixos-unstable";
+  outputs = {nixpkgs, ...}: let
+    systems = ["x86_64-linux" "aarch64-linux"];
+    forAllSystems = f:
+      builtins.listToAttrs (map (system: {
+          name = system;
+          value = f system;
+        })
+        systems);
+
+    pkgsFor = system: nixpkgs.legacyPackages.${system};
+  in {
+    devShells = forAllSystems (system: let
+      pkgs = pkgsFor system;
+    in {
+      default = pkgs.callPackage ./shell.nix {};
+    });
+  };
+}