diff --git a/package-linux.sh b/package-linux.sh
index 2324221..0c7cd5c 100755
--- a/package-linux.sh
+++ b/package-linux.sh
@@ -21,6 +21,11 @@ fi
 
 if [ ! -d "$PPA_DIR" ]; then
     mkdir -p "$PPA_DIR"
+else
+    echo -n "PPA work folder already exists: $PPA_DIR
+Move this folder aside or remove it.
+"
+    exit 2
 fi
 
 # tar 1.28 required for --exclude-vcs-ignores