diff --git a/contrib/docker/build.sh b/contrib/docker/build.sh
index 40e12e096..833ce66d4 100755
--- a/contrib/docker/build.sh
+++ b/contrib/docker/build.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-[[ -z `echo $PWD | grep jenkins_home ]] && BASE_DIR=$(dirname $(realpath $0 )) || BASE_DIR="~/jenkins"
+[[ -z `echo $PWD | grep jenkins_home` ]] && BASE_DIR=$(dirname $(realpath $0 )) || BASE_DIR="~/jenkins"
 Alist="\n
 \t \t \t \t aarch64-linux-gnu \t (eg. Raspi4 with Ubuntu) \n
 \t \t \t \t arm-linux-gnueabihf \t (eg. Other Raspi) \n