diff --git a/CMakeLists.txt b/CMakeLists.txt
index f53a458d348..c84e011088a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -70,6 +70,7 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
 
 list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake/module)
+include(ProcessConfigurations)
 
 #=============================
 # Configurable options
@@ -230,11 +231,18 @@ if(BUILD_FOR_FUZZING)
   )
 endif()
 
-include(ProcessConfigurations)
-
 include(TryAppendCXXFlags)
 include(TryAppendLinkerFlag)
 
+# Redefine/adjust per-configuration flags.
+target_compile_definitions(core_interface_debug INTERFACE
+  DEBUG
+  DEBUG_LOCKORDER
+  DEBUG_LOCKCONTENTION
+  RPC_DOC_CHECK
+  ABORT_ON_FAILED_ASSUME
+)
+
 if(WIN32)
   #[=[
   This build system supports two ways to build binaries for Windows.
diff --git a/cmake/module/ProcessConfigurations.cmake b/cmake/module/ProcessConfigurations.cmake
index 7e2fc0080e9..9a510a00a55 100644
--- a/cmake/module/ProcessConfigurations.cmake
+++ b/cmake/module/ProcessConfigurations.cmake
@@ -4,8 +4,6 @@
 
 include_guard(GLOBAL)
 
-include(TryAppendCXXFlags)
-
 macro(normalize_string string)
   string(REGEX REPLACE " +" " " ${string} "${${string}}")
   string(STRIP "${${string}}" ${string})
@@ -119,14 +117,8 @@ endfunction()
 
 set_default_config(RelWithDebInfo)
 
-# Redefine/adjust per-configuration flags.
-target_compile_definitions(core_interface_debug INTERFACE
-  DEBUG
-  DEBUG_LOCKORDER
-  DEBUG_LOCKCONTENTION
-  RPC_DOC_CHECK
-  ABORT_ON_FAILED_ASSUME
-)
+include(TryAppendCXXFlags)
+
 # We leave assertions on.
 if(MSVC)
   remove_cxx_flag_from_all_configs(/DNDEBUG)