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--- a/README.md
+++ b/README.md
@@ -1,4 +1,12 @@
 # nixos-configuration
 
 The collection of publically visible nixos-configuration files used for my
-personal machines.
+personal machines. The only file not tracked is `hardware-configuration.nix`
+since this is auto-generated when installinp NixOS.
+
+## Overview
+
+System-wide configuration is found in `configuration.nix`. User-specific
+configuration is grouped within a top-level directory corresponding to the
+user's username (as of now, just `jrpotter`). The top-level `flake.nix` file
+links the system and user configurations together.