--- a/source/blender/blenlib/CMakeLists.txt
+++ b/source/blender/blenlib/CMakeLists.txt
@@ -13,7 +13,7 @@ set(INC

 set(INC_SYS
   ../../../extern/wcwidth
-  ../../../extern/json/include
+  /usr/include/nlohmann

   ${EIGEN3_INCLUDE_DIRS}
   ${ZLIB_INCLUDE_DIRS}
@@ -386,7 +386,7 @@ set(SRC
   PIL_time_utildefines.h
 
   # Without these files listed, they aren't known to CMake.
-  ../../../extern/json/include/json.hpp
+  /usr/include/nlohmann/json.hpp
 )
 
 set(LIB
--- a/intern/ghost/CMakeLists.txt
+++ b/intern/ghost/CMakeLists.txt
@@ -608,7 +608,7 @@ if(WITH_XR_OPENXR)
     ../../extern/tinygltf/tiny_gltf.h
   )
   list(APPEND INC_SYS
-    ../../extern/json/include
+    /usr/include/nlohmann
     ../../extern/tinygltf
   )
   list(APPEND INC_SYS