diff --git a/README.adoc b/README.adoc
index 3b70870..daf88c4 100644
--- a/README.adoc
+++ b/README.adoc
@@ -297,7 +297,7 @@ git log | grep -E '    Linux [0-9]+\.' | head
 Build configuration can be observed in guest with:
 
 ....
-zcat /proc/config.gz
+/conf.sh
 ....
 
 or on host:
diff --git a/rootfs_overlay/conf.sh b/rootfs_overlay/conf.sh
new file mode 100755
index 0000000..5a4d1e7
--- /dev/null
+++ b/rootfs_overlay/conf.sh
@@ -0,0 +1,2 @@
+#!/usr/bin/env bash
+zcat /proc/config.gz