# Mender-convert fails
**URL:** https://hub.mender.io/t/mender-convert-fails/1967
**Category:** General Discussions
**Created:** [May 25, 2020, 4:31pm UTC](https://hub.mender.io/t/mender-convert-fails/1967 "2020-05-25T16:31:58Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@cakebread](https://hub.mender.io/u/cakebread)
#### Post date: [May 25, 2020, 4:31pm UTC](https://hub.mender.io/t/mender-convert-fails/1967/1 "2020-05-25T16:31:58Z")
I can’t find an issue tracker on github for mender-convert.
I’m following the documentation here:
[https://docs.mender.io/2.3/artifacts/debian-family/building-a-mender-debian-image](https://docs.mender.io/2.3/artifacts/debian-family/building-a-mender-debian-image)
When running ‘docker-build’, I get the following errors:
```
Step 2/15 : RUN apt-get update && apt-get install -y build-essential git liblzma-dev
---> Running in d32703ed742f
Ign:1 http://security.ubuntu.com/ubuntu disco-security InRelease
Ign:2 http://archive.ubuntu.com/ubuntu disco InRelease
Err:3 http://security.ubuntu.com/ubuntu disco-security Release
404 Not Found [IP: 91.189.88.152 80]
Ign:4 http://archive.ubuntu.com/ubuntu disco-updates InRelease
Ign:5 http://archive.ubuntu.com/ubuntu disco-backports InRelease
Err:6 http://archive.ubuntu.com/ubuntu disco Release
404 Not Found [IP: 91.189.88.152 80]
Err:7 http://archive.ubuntu.com/ubuntu disco-updates Release
404 Not Found [IP: 91.189.88.152 80]
Err:8 http://archive.ubuntu.com/ubuntu disco-backports Release
404 Not Found [IP: 91.189.88.152 80]
Reading package lists...
E: The repository 'http://security.ubuntu.com/ubuntu disco-security Release' does not have a Release file.
E: The repository 'http://archive.ubuntu.com/ubuntu disco Release' does not have a Release file.
E: The repository 'http://archive.ubuntu.com/ubuntu disco-updates Release' does not have a Release file.
E: The repository 'http://archive.ubuntu.com/ubuntu disco-backports Release' does not have a Release file.
The command '/bin/sh -c apt-get update && apt-get install -y build-essential git liblzma-dev' returned a non-zero code: 100
```
---
### Author:  [@mirzak](https://hub.mender.io/u/mirzak)
#### Post date: [May 25, 2020, 4:45pm UTC](https://hub.mender.io/t/mender-convert-fails/1967/2 "2020-05-25T16:45:40Z")
Hi @cakebread,
Unfortunately the Docker base image that we used for the `2.0.0` got removed or Ubuntu stopped supporting it.
It was fixed in, [https://github.com/mendersoftware/mender-convert/commit/cf3bd3eebe6ce397b8bb1f5d697b8470adf92e40](https://github.com/mendersoftware/mender-convert/commit/cf3bd3eebe6ce397b8bb1f5d697b8470adf92e40).
But you will need to use the `2.0.x` branch to get this fix. You can change branch by e.g running:
```auto
git checkout 2.0.x
```