tailscale-nginx-auth: re-use most from tailscale package

pkgs/by-name/ta/tailscale-nginx-auth/package.nix

@@ -1,31 +1,13 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, stdenv, buildGoModule, tailscale }:
 
-let
-  version = "1.68.1";
-in
 buildGoModule {
   pname = "tailscale-nginx-auth";
-  inherit version;
-
-  src = fetchFromGitHub {
-    owner = "tailscale";
-    repo = "tailscale";
-    rev = "v${version}";
-    hash = "sha256-ZAzro69F7ovfdqzRss/U7puh1T37bkEtUXabCYc5LwU=";
-  };
-  vendorHash = "sha256-SUjoeOFYz6zbEgv/vND7kEXbuWlZDrUKF2Dmqsf/KVw=";
+  inherit (tailscale) version src vendorHash ldflags;
 
   CGO_ENABLED = 0;
 
   subPackages = [ "cmd/nginx-auth" ];
 
-  ldflags = [
-    "-w"
-    "-s"
-    "-X tailscale.com/version.longStamp=${version}"
-    "-X tailscale.com/version.shortStamp=${version}"
-  ];
-
   postInstall = lib.optionalString stdenv.isLinux ''
     mv $out/bin/nginx-auth $out/bin/tailscale.nginx-auth
     sed -i -e "s#/usr/sbin#$out/bin#" ./cmd/nginx-auth/tailscale.nginx-auth.service