Update macbook to home-manager 21.11

overlays/bugfixes/delta/default.nix

@@ -0,0 +1,15 @@
+final: prev: {
+  delta =
+    if (prev.delta.version == "0.10.0") then
+    # There is a bug where prev.delta on v0.10.0 does NOT have adequate dependencies on Darwin.
+      (prev.delta.overrideAttrs
+        (oldAttrs: {
+          version = "0.10.0-patched";
+          buildInputs = final.lib.optionals final.stdenv.isDarwin (with final; [
+            darwin.apple_sdk.frameworks.DiskArbitration
+            darwin.apple_sdk.frameworks.Foundation
+            darwin.apple_sdk.frameworks.Security
+            libiconv
+          ]);
+        })) else prev.delta;
+}