diff -up ./CMakeLists.txt.offline ./CMakeLists.txt
--- ./CMakeLists.txt.offline	2025-06-19 23:11:29.000000000 +0200
+++ ./CMakeLists.txt	2025-08-06 15:07:48.607390466 +0200
@@ -69,6 +69,13 @@ else()
     endif()
 endif()
 
+if(VALKEY_INCLUDE_DIR)
+    if(ENABLE_UNIT_TESTS OR ENABLE_INTEGRATION_TESTS)
+        message(FATAL_ERROR "Incompatible option VALKEY_INCLUDE_DIR with ENABLE_UNIT_TESTS or ENABLE_INTEGRATION_TESTS")
+    endif()
+    file(MAKE_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/src/include")
+    file(COPY_FILE "${VALKEY_INCLUDE_DIR}/valkeymodule.h" "${CMAKE_CURRENT_SOURCE_DIR}/src/include/valkeymodule.h")
+else()
 ExternalProject_Add(
     valkey
     GIT_REPOSITORY https://github.com/valkey-io/valkey.git
@@ -94,6 +101,7 @@ ExternalProject_Add_Step(
     COMMAND ${CMAKE_COMMAND} -E copy ${VALKEY_DOWNLOAD_DIR}/src/valkey/src/valkeymodule.h ${VALKEY_INCLUDE_DIR}/valkeymodule.h
     ALWAYS 1
 )
+endif()
 
 # Integration tests require the valkey-test-framework which is only needed when
 # building Valkey from source.
@@ -171,11 +179,18 @@ message("CMAKE_C_FLAGS: ${CMAKE_C_FLAGS}
 message("CMAKE_CXX_FLAGS: ${CMAKE_CXX_FLAGS}")
 
 # Fetch RapidJSON
+if(RAPIDJSON_SOURCE_DIR)
+FetchContent_Declare(
+    rapidjson
+    SOURCE_DIR "${RAPIDJSON_SOURCE_DIR}"
+)
+else()
 FetchContent_Declare(
     rapidjson
     GIT_REPOSITORY https://github.com/Tencent/rapidjson.git
     GIT_TAG ebd87cb468fb4cb060b37e579718c4a4125416c1
 )
+endif()
 
 # Disable RapidJSON tests and examples
 set(RAPIDJSON_BUILD_TESTS OFF CACHE BOOL "Build rapidjson tests" FORCE)
diff -up ./src/CMakeLists.txt.offline ./src/CMakeLists.txt
--- ./src/CMakeLists.txt.offline	2025-06-19 23:11:29.000000000 +0200
+++ ./src/CMakeLists.txt	2025-08-06 15:09:25.030234068 +0200
@@ -39,4 +39,7 @@ target_sources(${OBJECT_TARGET}
 )
 
 add_library(${JSON_MODULE_LIB} SHARED $<TARGET_OBJECTS:${OBJECT_TARGET}>)
+
+if(ENABLE_UNIT_TESTS OR ENABLE_INTEGRATION_TESTS)
 add_dependencies(${OBJECT_TARGET} valkey)
+endif()