Update build.sh

Author: MustardChef

scripts/build.sh

@@ -21,8 +21,9 @@
 # shellcheck disable=SC2034
 cd "$(dirname "$0")" || exit 1
 WORK_DIR=$(mktemp -d -t wsa-build-XXXXXXXXXX_) || exit 1
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 PARENT_DIR="$(dirname "$SCRIPT_DIR")"
-chmod 777 "$PARENT_DIR"
+sudo chmod 777 -R "$PARENT_DIR"
 
 # lowerdir
 ROOT_MNT_RO="$WORK_DIR/erofs"