diff --git a/board/beagleboard/beaglebone/post-build.sh b/board/beagleboard/beaglebone/post-build.sh
index b7afd92ffe..f2ee613949 100755
--- a/board/beagleboard/beaglebone/post-build.sh
+++ b/board/beagleboard/beaglebone/post-build.sh
@@ -1,5 +1,7 @@
 #!/bin/sh
-BOARD_DIR="$(dirname $0)"
+set -eu
+
+BOARD_DIR="$(dirname "$0")"
 
 cp $BOARD_DIR/uEnv.txt $BINARIES_DIR/uEnv.txt