diff --git a/Makefile b/Makefile
index 6b5732c..1cb1e6f 100644
--- a/Makefile
+++ b/Makefile
@@ -1,17 +1,27 @@
 
+# Generate everything: extension and blacklists.
 all : all_blacklists BarbBlock.txt package
 
+# Generically generate standalone blacklist files.
 blacklists/%.txt : src/generate_blacklist.py blacklist.yaml templates/%.txt.tmpl
 	python $^ $@
 
+# Generate files related to the extension.
 extension/% : src/generate_blacklist.py blacklist.yaml templates/extension-%.tmpl
 	python $^ $@
 
+# Package the extension as a zip.
 package : extension/manifest.json extension/barbblock.js
 	cd extension; zip barbblock.zip -r ./ -x *.git*
 	mv extension/barbblock.zip ./
 
-all_blacklists : blacklists/adblock-plus.txt blacklists/hosts-file.txt blacklists/ublock-origin.txt blacklists/domain-list.txt
+# Build all of the standalone files.
+all_blacklists : \
+	blacklists/adblock-plus.txt \
+	blacklists/hosts-file.txt \
+	blacklists/ublock-origin.txt \
+	blacklists/domain-list.txt
 
+# Copy the ublock blacklist to /BarbBlock.txt for legacy reasons.
 BarbBlock.txt : blacklists/ublock-origin.txt
 	cp $< $@