diff --git a/tools/server-docker-compose.sh b/tools/server-docker-compose.sh
index 97911b3..c58e5ff 100644
--- a/tools/server-docker-compose.sh
+++ b/tools/server-docker-compose.sh
@@ -2,13 +2,13 @@
 
 # manage docker-compose with this macro
 
-if ! [ -d "servers/$(hostname)" ]; then
-    echo "couldn't find servers/$(hostname)"
+if ! [ -d "servers/$HOSTNAME" ]; then
+    echo "couldn't find servers/$HOSTNAME"
     exit 1
 fi
 
-dc_args="-p $(hostname)"
-for f in servers/$(hostname)/docker-compose.d/*.yml; do
+dc_args="-p $HOSTNAME"
+for f in servers/$HOSTNAME/docker-compose.d/*.yml; do
     dc_args="$dc_args -f $f"
 done