diff --git a/a/kernel-gwh/SlackBuild b/a/kernel-gwh/SlackBuild
index 3e437ab4..02c8ca52 100755
--- a/a/kernel-gwh/SlackBuild
+++ b/a/kernel-gwh/SlackBuild
@@ -1,9 +1,10 @@
 #!/bin/sh
 
 set -e
+set -x
 
 CWD=$(pwd)
-THIS_HOST=$(hostname -s)
+THIS_HOST=${THIS_HOST:-$(hostname -s)}
 PRGNAM=$(basename $CWD)-$THIS_HOST
 BUILD=${BUILD:-1}
 BRANCH=${BRANCH:-mainline}        # stable ; mainline