diff --git a/bin/rbenv-install b/bin/rbenv-install
index dae58cd6ef..9dae372233 100755
--- a/bin/rbenv-install
+++ b/bin/rbenv-install
@@ -11,6 +11,10 @@
 #                    (defaults to $RBENV_ROOT/sources)
 #   -v/--verbose     Verbose mode: print compilation status to stdout
 #
+# For detailed information on installing Ruby versions with
+# ruby-build, including a list of environment variables for adjusting
+# compilation, see: https://github.com/sstephenson/ruby-build#usage
+#
 set -e
 [ -n "$RBENV_DEBUG" ] && set -x