nix: initial tooling

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: Ibc12bc627f65a4b1d3430bdf8b86db256a6a6964

flake.nix

@@ -0,0 +1,24 @@
+{
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs?ref=nixos-unstable";
+
+  outputs = {
+    self,
+    nixpkgs,
+    ...
+  }: let
+    systems = ["x86_64-linux" "aarch64-linux"];
+    forEachSystem = nixpkgs.lib.genAttrs systems;
+    pkgsForEach = nixpkgs.legacyPackages;
+  in {
+    packages = forEachSystem (system: {
+      sin = pkgsForEach.${system}.callPackage ./nix/package.nix {};
+      default = self.packages.${system}.sin;
+    });
+
+    devShells = forEachSystem (system: {
+      default = pkgsForEach.${system}.mkShell {
+        inputsFrom = [self.packages.${system}.default];
+      };
+    });
+  };
+}