too lazy to think of a message, so enjoy this pointless text. Good luck future me...

pkgs/crossplane/default.nix

@@ -0,0 +1,15 @@
+{ pkgs, lib, ... }:
+
+pkgs.buildGoModule rec {
+  pname = "crossplane";
+  version = "2.0.2";
+
+  src = pkgs.fetchFromGitHub {
+    owner = "crossplane";
+    repo = "crossplane";
+    tag = "v2.0.2";
+    sha256 = "sha256-EIDrBQmtMaHlapVNUYABKejIj1I02g5R5h4cADZvtAg=";
+  };
+
+  vendorHash = "sha256-8VqKtWbnDGbmgxT13v2d4+nXHouZ4hi2c2m66SAd1KM=";
+}

pkgs/flake-module.nix

@@ -0,0 +1,13 @@
+{ ... }:
+
+{
+  imports = [];
+
+  perSystem =
+    { config, pkgs, ... }:
+    {
+      packages = {
+        # crossplane = pkgs.callPackage ./crossplane { };
+      };
+    };
+}