diff --git a/CMakeLists.txt b/CMakeLists.txt
index 62cb03780..309122222 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -239,24 +239,24 @@ if (ZMQ_PREFIX STREQUAL "bundled")
         --enable-static
       )
       list(APPEND libsodium_configure ${PYZMQ_LIBSODIUM_CONFIGURE_ARGS})
-      execute_process(
-        COMMAND ${libsodium_configure}
-        WORKING_DIRECTORY ${bundled_libsodium_SOURCE_DIR}
-        COMMAND_ECHO      STDOUT
-        COMMAND_ERROR_IS_FATAL ANY
-      )
-      execute_process(
-        COMMAND make
-        WORKING_DIRECTORY ${bundled_libsodium_SOURCE_DIR}
-        COMMAND_ECHO STDOUT
-        COMMAND_ERROR_IS_FATAL ANY
-      )
-      execute_process(
-        COMMAND make install
-        WORKING_DIRECTORY ${bundled_libsodium_SOURCE_DIR}
-        COMMAND_ECHO STDOUT
-        COMMAND_ERROR_IS_FATAL ANY
-      )
+      # execute_process(
+      #   COMMAND ${libsodium_configure}
+      #   WORKING_DIRECTORY ${bundled_libsodium_SOURCE_DIR}
+      #   COMMAND_ECHO      STDOUT
+      #   COMMAND_ERROR_IS_FATAL ANY
+      # )
+      # execute_process(
+      #   COMMAND make
+      #   WORKING_DIRECTORY ${bundled_libsodium_SOURCE_DIR}
+      #   COMMAND_ECHO STDOUT
+      #   COMMAND_ERROR_IS_FATAL ANY
+      # )
+      # execute_process(
+      #   COMMAND make install
+      #   WORKING_DIRECTORY ${bundled_libsodium_SOURCE_DIR}
+      #   COMMAND_ECHO STDOUT
+      #   COMMAND_ERROR_IS_FATAL ANY
+      # )
     endif()
   endif()
 
@@ -272,6 +272,24 @@ if (ZMQ_PREFIX STREQUAL "bundled")
   set(BUILD_TESTS OFF)
   set(BUILD_SHARED OFF)
   set(BUILD_STATIC ON)
+
+  if(NOT MSVC)
+    # backport check for kqueue, which is wrong in libzmq 4.3.5
+    # libzmq's cmake will proceed with the rest
+    # https://github.com/zeromq/libzmq/pull/4659
+    include(CheckCXXSymbolExists)
+    set(POLLER
+      ""
+      CACHE STRING "Choose polling system for I/O threads. valid values are
+    kqueue, epoll, devpoll, pollset, poll or select [default=autodetect]")
+    if(POLLER STREQUAL "")
+      check_cxx_symbol_exists(kqueue "sys/types.h;sys/event.h;sys/time.h" HAVE_KQUEUE)
+      if(HAVE_KQUEUE)
+        set(POLLER "kqueue")
+      endif()
+    endif()
+  endif()
+
   if(MSVC)
     set(API_POLLER "select" CACHE STRING "Set API Poller (default: select)")
   endif()