# Support for building images on host Ubuntu 20.04

**URL:** <https://forums.balena.io/t/support-for-building-images-on-host-ubuntu-20-04/172015>\
**Category:** balenaOS\
**Created:** [August 11, 2020, 9:34pm UTC](https://forums.balena.io/t/support-for-building-images-on-host-ubuntu-20-04/172015 "2020-08-11T21:34:04Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![jpk](https://avatars.discourse-cdn.com/v4/letter/j/71e660/32.png) [@jpk](https://forums.balena.io/u/jpk)\
**Post date:** [August 11, 2020, 9:34pm UTC](https://forums.balena.io/t/support-for-building-images-on-host-ubuntu-20-04/172015/1 "2020-08-11T21:34:04Z")

</div>

I’m running into issues when building balena-jetson on Ubuntu 20.04  
The build command I’m using is  
barys -m jetson-xavier

I see the warnings:  
WARNING: Your host glibc verson (2.31) is newer than that in uninative (2.29). Disabling uninative so that sstate is not corrupted.  
WARNING: Host distribution “ubuntu-20.04” has not been validated with this version of the build system; you may possibly experience unexpected failures. It is recommended that you use a tested distribution

And the compilation error I see indeed appears to be an incompatibility between qemu and my version of glibc:  
/home/jonathan/balena-jetson/build/tmp/work/x86\_64-linux/qemu-native/3.1.0-r0/qemu-3.1.0/linux-user/syscall.c:253:16: error: static declaration of ‘gettid’ follows non-static declaration

See reference: [https://patchwork.openembedded.org/patch/165581/](https://patchwork.openembedded.org/patch/165581/)

When will you support building on host Ubuntu 20.04 and/or is there a workaround to get things going for me.

---

<div class="post-metadata">

**Author:** ![wrboyce](https://sea2.discourse-cdn.com/balena/user_avatar/forums.balena.io/wrboyce/32/374_2.png) [@wrboyce](https://forums.balena.io/u/wrboyce)\
**Post date:** [August 11, 2020, 10:58pm UTC](https://forums.balena.io/t/support-for-building-images-on-host-ubuntu-20-04/172015/6 "2020-08-11T22:58:42Z")

</div>

Hi Jonathan, the Yocto rule for OS support is “current release minus one”, meaning I would expect to see support for building yocto projects under Ubuntu 20.04 sometime after October 2020.