diff --git a/Makefile b/Makefile
index 4c3154d..5157062 100644
--- a/Makefile
+++ b/Makefile
@@ -14,22 +14,23 @@ BUILD_DIR=js
 
 all: dev
 
-dev: src/**
-	@mkdir -p $(BUILD_DIR)
+dev: js/main.js
+
+release: js/main.min.js
+
+js/main.js: src/**
 	$(ELM) make src/Main.elm --output $(BUILD_DIR)/main.js
 
-release: src/**
-	@mkdir -p $(BUILD_DIR)
-	@$(ELM) make src/Main.elm --optimize --output $(BUILD_DIR)/main.tmp.js
+js/main.min.js: js/main.tmp.js
 	@$(UGLIFYJS) $(BUILD_DIR)/main.tmp.js --compress 'pure_funcs="F2,F3,F4,F5,F6,F7,F8,F9,A2,A3,A4,A5,A6,A7,A8,A9",pure_getters,keep_fargs=false,unsafe_comps,unsafe' | uglifyjs --mangle > $(BUILD_DIR)/main.min.js
 
+js/main.tmp.js: src/**
+	@$(ELM) make src/Main.elm --optimize --output $(BUILD_DIR)/main.tmp.js
+
 watch:
-	@mkdir -p $(BUILD_DIR)
 	@$(ELMLIVE) src/Main.elm -p 7000 -d . -- --output $(BUILD_DIR)/main.js
 
 clean:
-	@/bin/echo -e "\033[32;1m    Cleaning\033[0m client"
-	@rm -rf $(BUILD_DIR)
-	@/bin/echo -e "\033[32;1m     Cleaned\033[0m client"
+	@rm -rf $(BUILD_DIR)/{main.js,main.min.js}