debootstrap: Copy qemu-arm-static for Docker-in-Docker bind mount

debootstrap/make-image.sh

@@ -19,9 +19,15 @@ if [ ! -x /usr/bin/qemu-arm-static ]; then
   exit 1
 fi
 
+# make a copy to avoid bind mount problems with dind
+qemu="$(mktemp)"
+cp -av /usr/bin/qemu-arm-static "$qemu"
+
 docker run -i $opts --rm \
   --privileged \
   -e "TARBALL=$TARBALL" \
-  -v /usr/bin/qemu-arm-static:/usr/bin/qemu-arm-static:ro \
+  -v "${qemu}:/usr/bin/qemu-arm-static:ro" \
   -v "$(pwd):/work" -w "/work" \
   "$IMAGE" "$@"
+
+rm -f "${qemu}"