--- CMakeLists.txt.orig	2025-04-24 10:33:03 UTC
+++ CMakeLists.txt
@@ -60,7 +60,7 @@ check_cxx_compiler_flag("-march=native" CXX_HAS_NATIVE
 
 # Specify target architecture.
 check_cxx_compiler_flag("-march=native" CXX_HAS_NATIVE)
-if(CXX_HAS_NATIVE)
+if(FALSE AND CXX_HAS_NATIVE)
     set(ARB_DEFAULT_ARCH "native")
 else()
     set(ARB_DEFAULT_ARCH "none")
@@ -302,11 +302,7 @@ install(TARGETS ext-hwloc EXPORT arbor-targets)
 endif()
 install(TARGETS ext-hwloc EXPORT arbor-targets)
 
-CPMFindPackage(NAME json
-              GITHUB_REPOSITORY nlohmann/json
-              VERSION 3.12.0
-              OPTIONS "CMAKE_SUPPRESS_DEVELOPER_WARNINGS ON")
-install(TARGETS nlohmann_json EXPORT arbor-targets)
+find_package(nlohmann_json REQUIRED)
 
 add_library(ext-random123 INTERFACE)
 CPMFindPackage(NAME random123