fix symlink build issue

Makefile

@@ -1,7 +1,6 @@
 all: build
 
 build:
-	@rm -rf comby 
 	@dune build --profile dev
 	@ln -sfn _build/install/default/bin/comby comby
 
@@ -16,10 +15,6 @@ release:
 byte:
 	@dune build src/main.bc
 
-# Uncomment this when dune is fixed: https://github.com/ocaml/dune/issues/4258
-# comby:
-#	@ln -s _build/install/default/bin/$@ ./$@
-
 install:
 	@dune install
 
@@ -34,6 +29,7 @@ coverage:
 
 clean:
 	@dune clean
+	@rm -rf comby
 
 uninstall:
 	@dune uninstall
@@ -44,4 +40,4 @@ promote:
 docker-test-build:
 	docker build -t comby-local-test-build .
 
-.PHONY: all build build-with-coverage release install doc test coverage clean uninstall promote docker-test-build comby 
+.PHONY: all build build-with-coverage release install doc test coverage clean uninstall promote docker-test-build