diff --git a/nrf5/sdk/sdk_12.1.0/sdk.mk b/nrf5/sdk/sdk_12.1.0/sdk.mk
index 2c744f013d..69c314a0fb 100644
--- a/nrf5/sdk/sdk_12.1.0/sdk.mk
+++ b/nrf5/sdk/sdk_12.1.0/sdk.mk
@@ -1,8 +1,6 @@
 
 INC += -I./$(SDK_MODULES_PATH)
 
-include $(SDK_MODULES_PATH)build.mk
-
 INC += -I$(SDK_ROOT)components/softdevice/$(SD)/headers
 INC += -I$(SDK_ROOT)components/softdevice/$(SD)/headers/$(MCU_VARIANT)
 CFLAGS += -DBLUETOOTH_SD_DEBUG=1