5eb53be671b4103626d0c0bb7828474d8be03ec7

 1diff --git a/builddefs/build_keyboard.mk b/builddefs/build_keyboard.mk
 2index afad67a76da70a97fc973de02d10c987d1efb735..7d58c29462ac5c23b96e9df0f818b6490deebd5f 100644
 3--- a/builddefs/build_keyboard.mk
 4+++ b/builddefs/build_keyboard.mk
 5@@ -197,8 +197,10 @@ ifneq ("$(wildcard $(KEYMAP_JSON))", "")
 6     KEYMAP_C := $(INTERMEDIATE_OUTPUT)/src/keymap.c
 7     KEYMAP_H := $(INTERMEDIATE_OUTPUT)/src/config.h
 8 
 9-    # Load the keymap-level rules.mk if exists
10-    -include $(KEYMAP_PATH)/rules.mk
11+    ifeq ($(OTHER_KEYMAP_C),)
12+        # Load the keymap-level rules.mk if exists (and we havent already loaded it for keymap.c)
13+        -include $(KEYMAP_PATH)/rules.mk
14+    endif
15 
16     # Load any rules.mk content from keymap.json
17     INFO_RULES_MK = $(shell $(QMK_BIN) generate-rules-mk --quiet --escape --output $(INTERMEDIATE_OUTPUT)/src/rules.mk $(KEYMAP_JSON))