# Falha ao reconstruir o app
**URL:** https://meta.discourse.org/t/rebuild-app-failing/99317
**Category:** Self-hosting
**Created:** [Outubro 11, 2018, 8:14pm UTC](https://meta.discourse.org/t/rebuild-app-failing/99317 "2018-10-11T20:14:08Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@mcclell](https://meta.discourse.org/u/mcclell)
#### Post date: [Outubro 11, 2018, 8:14pm UTC](https://meta.discourse.org/t/rebuild-app-failing/99317/1 "2018-10-11T20:14:08Z")
Hi,
I installed Discourse in a Ubuntu 18.04.1 LTS VM on our Hyper-V server.
The initial setup works and I get to the point where it is supposed to send the activation email and that failed.
I edited the SMTP settings in app.yml and did a `./launcher rebuild app`. This fails with the following error message
`/usr/bin/docker: Error response from daemon: error while creating mount source path '/var/discourse/shared/standalone': mkdir /var/discourse: read-only file system.`
There does not appear to be a `/var/discourse/shared/standalone` directory at this point.
Any suggestions?
Thanks,
Charlotte
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### Author:  [@Stephen](https://meta.discourse.org/u/Stephen)
#### Post date: [Outubro 11, 2018, 10:31pm UTC](https://meta.discourse.org/t/rebuild-app-failing/99317/2 "2018-10-11T22:31:24Z")
Is this a [standard install](https://meta.discourse.org/t/142537?silent=true) of Ubuntu on EXT4? Is there any other software on the VM?
Did you follow the [standard install guide](https://github.com/discourse/discourse/blob/master/docs/INSTALL-cloud.md)?
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### Author:  [@mcclell](https://meta.discourse.org/u/mcclell)
#### Post date: [Outubro 12, 2018, 4:40am UTC](https://meta.discourse.org/t/rebuild-app-failing/99317/3 "2018-10-12T04:40:56Z")
I rebuilt the VM with Ubuntu 16.04.5 LTS and now it is working.
thanks,
Charlotte
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### Author:  [@zogstrip](https://meta.discourse.org/u/zogstrip)
#### Post date: [Outubro 12, 2018, 9:57am UTC](https://meta.discourse.org/t/rebuild-app-failing/99317/4 "2018-10-12T09:57:20Z")