Changed dirty check for Makefile

bundles/independent/Makefile

@@ -4,14 +4,16 @@ IMAGE_NAME := your/image
 # Path to your sources
 IMAGE_PATH := application
 
+# Find all image sources
+IMAGE_SOURCES := $(shell find $(IMAGE_PATH) -type f)
+
 # Create the image tag from the commit date
 IMAGE_TAG := $(shell git show --quiet --date=format:%Y.%m.%d --format=%cd)
 
-# Create the image status from the working tree status
-IMAGE_STATUS := $(shell git diff --quiet || echo "-dirty")
-
-# Find all image sources
-IMAGE_SOURCES := $(shell find $(IMAGE_PATH) -type f)
+# Check if the repository has unstaged changes
+ifneq ($(shell git status --porcelain),)
+    IMAGE_TAG := $(IMAGE_TAG)-dirty
+endif
 
 all: image