diff --git a/Makefile b/Makefile
index 3339faa3..692acad6 100644
--- a/Makefile
+++ b/Makefile
@@ -43,11 +43,28 @@ $(PACKER):
 	rm $(PACKER).zip
 	chmod +x $@
 
+SDIST := dist/pwnagotchi-$(PWN_VERSION).tar.gz
+$(SDIST): setup.py pwnagotchi
+	python3 setup.py sdist
+
+# Building the image requires packer, but don't rebuild the image just because packer updated.
 $(PWN_RELEASE).img: | $(PACKER)
+
+# If the packer or ansible files are updated, rebuild the image.
+$(PWN_RELEASE).img: $(SDIST) builder/pwnagotchi.json.pkr.hcl builder/raspberrypi32.yml builder/raspberrypi64.yml builder/orangepi.yml builder/extras/nexmon.yml $(shell find builder/data -type f)
+
 	cd builder && packer init pwnagotchi.json.pkr.hcl && sudo $(UNSHARE) $(PACKER) build -var "pwn_hostname=$(PWN_HOSTNAME)" -var "pwn_version=$(PWN_VERSION)" pwnagotchi.json.pkr.hcl
 
+# If any of these files are updated, rebuild the checksums.
+$(PWN_RELEASE).sha256: $(PWN_RELEASE).img
+	sha256sum $^ > $@
+
+# If any of the input files are updated, rebuild the archive.
+$(PWN_RELEASE).zip: $(PWN_RELEASE).img $(PWN_RELEASE).sha256
+	zip $(PWN_RELEASE).zip $^
+
 .PHONY: image
-image:
+image: $(PWN_RELEASE).zip
 
 clean:
 	- python3 setup.py clean --all