diff --git a/board/boundarydevices/nitrogen6x/post-build.sh b/board/boundarydevices/nitrogen6x/post-build.sh
index cc6e66acf..2b43aa322 100755
--- a/board/boundarydevices/nitrogen6x/post-build.sh
+++ b/board/boundarydevices/nitrogen6x/post-build.sh
@@ -8,11 +8,11 @@
 BOARD_DIR="$(dirname $0)"
 
 # bd u-boot looks for bootscript here
-cp $BOARD_DIR/6x_bootscript $TARGET_DIR
+install -D -m 0644 $BOARD_DIR/6x_bootscript $TARGET_DIR/6x_bootscript
 
 # u-boot / update script for bd upgradeu command
 if [ -e $BINARIES_DIR/u-boot.imx ];
 then
-    cp $BINARIES_DIR/u-boot.imx $TARGET_DIR
-    cp $BOARD_DIR/6x_upgrade $TARGET_DIR
+    install -D -m 0644 $BINARIES_DIR/u-boot.imx $TARGET_DIR/u-boot.imx
+    install -D -m 0644 $BOARD_DIR/6x_upgrade $TARGET_DIR/6x_upgrade
 fi