diff --git a/Makefile b/Makefile
index 3154eeacd1ae911e3db797f9f1226c6ce5437cd9..04568cd9a40b7b8287d740e7f5939325285b0522 100644
--- a/Makefile
+++ b/Makefile
@@ -32,7 +32,9 @@ $(LOCAL_DIR)/%/:
 
 .PHONY: clean
 clean:
-	rm -rf \
+	echo "DELETING: $(APP_NODE_MODULE_DIRS) $(TEMP_DIR) $(LOCAL_DIR)/dist" | tr ' ' '\n'
+	read -p "OK? [N,y] " input; [[ "$${input}" == "y" ]] \
+	&& rm -rf \
 		$(APP_NODE_MODULE_DIRS) \
 		$(TEMP_DIR) \
 		$(LOCAL_DIR)/dist
@@ -43,7 +45,9 @@ clean:
 build: SERVER_PUBLIC_URL ?= http://127.0.0.1:3001
 build: APP_BUILD_PATH ?= $(TEMP_DIR)
 build:
-	rm -rf $(APP_BUILD_PATH)
+	echo "DELETING: $(APP_BUILD_PATH)" | tr ' ' '\n'
+	read -p "OK? [N,y] " input; [[ "$${input}" == "y" ]] \
+	&& rm -rf $(APP_BUILD_PATH)
 
 	cp -r $(MKFILE_DIR)/app/server/src $(APP_BUILD_PATH)
 	cp $(MKFILE_DIR)/app/server/package* $(APP_BUILD_PATH)/
diff --git a/README.md b/README.md
index d94d924feef2e5ad48fd2ec91e536322c5058472..ea65e7dd8380b8401228b55f7975cb4f6266e1c9 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,8 @@
 Lecture: DevOps - Application
 =============================
 
+> :warning: __Invoking `make` in a path containing white spaces may lead to unforeseen side effects like DATA LOSS !__
+
 
 This repository contains the [application](./app/README.md) that is supposed be used as *deployable workload* in the
 [project assignment](https://github.com/lucendio/lecture-devops-material/blob/master/assignments/project-work.md)