diff --git a/CMakeLists.txt b/CMakeLists.txt
index f2efa3c..3f363dd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,15 +11,9 @@ endif()
 option(NBYTES_DEVELOPMENT_CHECKS "Enable development checks" OFF)
 
 include(GNUInstallDirs)
-include(FetchContent)
 
-FetchContent_Declare(
-  googletest
-  URL https://github.com/google/googletest/archive/03597a01ee50ed33e9dfd640b249b4be3799d395.zip
-)
-# For Windows: Prevent overriding the parent project's compiler/linker settings
-set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
-FetchContent_MakeAvailable(googletest)
+# Use find_package to use the gtest package provided by Nix
+find_package(GTest REQUIRED)
 
 add_subdirectory(src)
 enable_testing()