-# /etc/grml/fai/apt/sources.list provides by default.
-# Use the variable like your /etc/apt/sources.list looks like.
+# /etc/grml/fai/apt/sources.list provides by default. But please do *not*
+# manually edit /etc/grml/fai/apt/sources.list but instead use $GRML_LIVE_SOURCES.
+# Use the variable as your /etc/apt/sources.list looks like.