diff --git a/README.md b/README.md
index f358bc6..b3596a3 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,11 @@
 to reflect where you want the built tarballs to be exported, where you
 intend to install the tools, and what set of tools you want installed.
 
+NOTE: The `makefile` assumes RedHat/CentOS style package management.  That's
+because we run this inside of CentOS `docker` containers, even if we're
+working on debian or Ubuntu systems.   You'll have to update the file if you
+use `apt-get` package management.
+
 ## Release Versioning
 
 Both the bootstrap and full build process create tarballs *and rename