diff --git a/skel/README b/skel/README
index 95f4daa..ea859d5 100644
--- a/skel/README
+++ b/skel/README
@@ -10,6 +10,8 @@ Really Quick Instructions
 To build: ./make.sh
 To install: ./make.sh install
 
-You might want to edit 'config' first.
+You might want to edit 'config' first. You might also want to set
+'INSTALL_PREFIX', which is prepended onto the destination of any
+installed file.
 
 @TODO@