--- CMakeLists.txt.orig	2024-02-16 17:39:49 UTC
+++ CMakeLists.txt
@@ -1,7 +1,6 @@ project(pybind11_abseil LANGUAGES CXX)
 cmake_minimum_required(VERSION 3.11)
 project(pybind11_abseil LANGUAGES CXX)
 
-include(FetchContent)
 include(CTest)
 
 if(NOT DEFINED CMAKE_CXX_STANDARD)
@@ -16,19 +15,10 @@ endif()
   cmake_policy(SET CMP0135 NEW)
 endif()
 
-FetchContent_Declare(
-  abseil-cpp
-  URL https://github.com/abseil/abseil-cpp/archive/refs/tags/20230802.0.tar.gz
-  URL_HASH
-    SHA256=59d2976af9d6ecf001a81a35749a6e551a335b949d34918cfade07737b9d93c5)
+find_package(absl REQUIRED)
+find_package(pybind11 REQUIRED)
 
-FetchContent_Declare(
-  pybind11
-  URL https://github.com/pybind/pybind11/archive/refs/heads/master.tar.gz)
-
-FetchContent_MakeAvailable(abseil-cpp pybind11)
-
 set(TOP_LEVEL_DIR ${CMAKE_CURRENT_LIST_DIR})
-include_directories(${TOP_LEVEL_DIR} ${pybind11_INCLUDE_DIRS})
+include_directories(${TOP_LEVEL_DIR} ${abseil_INCLUDE_DIRS} ${pybind11_INCLUDE_DIRS})
 
 add_subdirectory(pybind11_abseil)