# Pbuilder fails due to tar: ./dev/zero: Cannot mknod: No such file or directory on arm64

**URL:** <https://travis-ci.community/t/pbuilder-fails-due-to-tar-dev-zero-cannot-mknod-no-such-file-or-directory-on-arm64/9309>\
**Category:** Multi CPU Architecture\
**Created:** [July 12, 2020, 2:03am UTC](https://travis-ci.community/t/pbuilder-fails-due-to-tar-dev-zero-cannot-mknod-no-such-file-or-directory-on-arm64/9309 "2020-07-12T02:03:15Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![dlech](https://sea1.discourse-cdn.com/flex015/user_avatar/travis-ci.community/dlech/32/911_2.png) [@dlech](https://travis-ci.community/u/dlech)\
**Post date:** [July 12, 2020, 2:03am UTC](https://travis-ci.community/t/pbuilder-fails-due-to-tar-dev-zero-cannot-mknod-no-such-file-or-directory-on-arm64/9309/1 "2020-07-12T02:03:15Z")

</div>

Trying to migrate a build from QEMU to ARM64 to speed up builds. As part of the build we use the debian pbuilder tool which creates a chroot. When creating this chroot from a tarball, the tar command fails because of tar: ./dev/zero: Cannot mknod: No such file or directory. Doing some googling, it sounds like this is an issue with the LXC container config.

[failing build](https://travis-ci.org/github/ev3dev/grx/jobs/707209250)

Any way to configure the LXC containers so that this works?