Improve Makefile for build on WSL

Makefile

@@ -1,13 +1,12 @@
-WINDOWS_DISTROD_PROJECT_PATH ?= distrod
-OUTPUT_ROOTFS_PATH ?= $(WINDOWS_DISTROD_PROJECT_PATH)/distrod_wsl_launcher/resources/distrod_root.tar.gz
+OUTPUT_ROOTFS_PATH ?= opt_distrod.tar.gz
 
 build: distrod-release
 
 rootfs:
 	./distrod_packer/distrod_packer ./distrod $(OUTPUT_ROOTFS_PATH)
 
 distrod-release: distrod-bins distrod/target/release/portproxy.exe
-	./distrod_packer/distrod_packer ./distrod opt_distrod.tar.gz --pack-distrod-opt-dir
+	./distrod_packer/distrod_packer ./distrod $(OUTPUT_ROOTFS_PATH) --pack-distrod-opt-dir
 
 distrod-bins:
 	cd distrod; cargo build --release -p distrod -p distrod-exec -p portproxy
@@ -34,11 +33,18 @@ test-linux: lint unit-test-linux integration-test-linux
 lint:
 	shellcheck install.sh
 
+clean:
+	cd distrod; cargo clean; cargo.exe clean
+
 ifneq ($(shell uname -a | grep microsoft),)  # This is a WSL environment, which means you can run .exe
 ROOTFS_PATH = $(OUTPUT_ROOTFS_PATH)
 OUTPUT_PORT_PROXY_EXE_PATH = distrod/target/release/portproxy.exe
-distrod_wsl_launcher: distrod-release
+
+$(ROOTFS_PATH): distrod-release
 include windows.mk
+
+.PHONY: $(ROOTFS_PATH)
 endif
 
-.PHONY: build rootfs distrod-release distrod-bins lint unit-test-linux integration-test-linux integration-test-linux-all-distros test-linux
+.PHONY: build rootfs distrod-release distrod-bins lint clean\
+        unit-test-linux enter-integration-test-linux integration-test-linux integration-test-linux-all-distros test-linux