diff --git a/make/project_config.mk b/make/project_config.mk
index cfa757520a..7c5c901aa6 100644
--- a/make/project_config.mk
+++ b/make/project_config.mk
@@ -92,6 +92,7 @@ define RunConfGen
 		--env "COMPONENT_KCONFIGS_PROJBUILD_SOURCE_FILE=$(COMPONENT_KCONFIGS_PROJBUILD_SOURCE_FILE)" \
 		--env "COMPONENT_SDKCONFIG_RENAMES=$(strip $(COMPONENT_SDKCONFIG_RENAMES))" \
 		--env "IDF_CMAKE=n" \
+		--env "IDF_ENV_FPGA=n" \
 		$(DEFAULTS_ARG) \
 		--output config ${SDKCONFIG} \
 		--output makefile $(SDKCONFIG_MAKEFILE) \
@@ -121,6 +122,7 @@ define RunMenuConf
 	COMPONENT_KCONFIGS_SOURCE_FILE="$(COMPONENT_KCONFIGS_SOURCE_FILE)" \
 	COMPONENT_KCONFIGS_PROJBUILD_SOURCE_FILE="$(COMPONENT_KCONFIGS_PROJBUILD_SOURCE_FILE)" \
 	IDF_CMAKE=n \
+	IDF_ENV_FPGA=n \
 	$(MENUCONFIG_CMD) $(IDF_PATH)/Kconfig
 endef