diff --git a/docker/dropshell_alpine_builder/build.sh b/docker/dropshell_alpine_builder/build.sh
old mode 100644
new mode 100755
index bdd2f45..e5b62aa
--- a/docker/dropshell_alpine_builder/build.sh
+++ b/docker/dropshell_alpine_builder/build.sh
@@ -6,7 +6,7 @@ ROOT_DIR=$(dirname $(dirname $(dirname $SCRIPT_DIR)))
 
 echo "Building dropshell from $ROOT_DIR"
 
-docker build -t dropshell_alpine_builder -context $ROOT_DIR-f $SCRIPT_DIR/Dockerfile $SCRIPT_DIR
+docker build -t dropshell_alpine_builder $ROOT_DIR -f $SCRIPT_DIR/Dockerfile
 
 rm -rf $SCRIPT_DIR/output
 mkdir -p $SCRIPT_DIR/output