fixup! Docker: run build commands as regular user

Makefile

@@ -173,15 +173,17 @@ style:
 
 DOCKERFILE  := $(shell find $(ROOT) -type f -name Dockerfile)
 DOCKERIMAGE := "ktf:build"
+ifeq ($(SYSTEM), LINUX)
+	DOCKER_BUILD_ARGS=--build-arg USER_ID=$$(id -u) --build-arg GROUP_ID=$$(id -g) --build-arg USER=$$USER
+else
+	DOCKER_BUILD_ARGS=--build-arg USER_ID=1024 --build-arg GROUP_ID=1024 --build-arg USER=$$USER
+endif
 
 .PHONY: dockerimage
 dockerimage:
 	@echo "Creating docker image"
 	@ docker build -t $(DOCKERIMAGE) -f $(DOCKERFILE) \
-		--build-arg USER_ID=$$(id -u) \
-		--build-arg GROUP_ID=$$(id -g) \
-		--build-arg USER=$$USER \
-		.
+		$(DOCKER_BUILD_ARGS) .
 
 .PHONY: docker%
 docker%: dockerimage