fix: add tailscale overlay

Works around kernel regression (see https://github.com/tailscale/tailscale/issues/16966#issuecomment-3246030218)

Signed-off-by: Lander Van den Bulcke <landervandenbulcke@gmail.com>

flake.nix

@@ -71,6 +71,17 @@
               nixpkgs.overlays = [
                 emacs-overlay.overlays.default
                 tidalcycles.overlays.default
+                (_: prev: {
+                  tailscale = prev.tailscale.overrideAttrs (old: {
+                    checkFlags = builtins.map (
+                      flag:
+                      if prev.lib.hasPrefix "-skip=" flag then
+                        flag + "|^TestGetList$|^TestIgnoreLocallyBoundPorts$|^TestPoller$"
+                      else
+                        flag
+                    ) old.checkFlags;
+                  });
+                })
               ];
             }
             ./hosts/wodan