systemd: mark as broken for static builds

pkgs/os-specific/linux/systemd/default.nix

@@ -687,6 +687,8 @@ stdenv.mkDerivation {
     description = "A system and service manager for Linux";
     license = licenses.lgpl21Plus;
     platforms = platforms.linux;
+    # https://github.com/systemd/systemd/issues/20600#issuecomment-912338965
+    broken = stdenv.hostPlatform.isStatic;
     priority = 10;
     maintainers = with maintainers; [ flokli kloenk mic92 ];
   };