# Rebuild fails because still on \`master\` branch. Fix with \`git checkout main\`
**URL:** https://meta.discourse.org/t/rebuild-fails-because-still-on-master-branch-fix-with-git-checkout-main/218277
**Category:** Support
**Created:** [February 15, 2022, 6:06pm UTC](https://meta.discourse.org/t/rebuild-fails-because-still-on-master-branch-fix-with-git-checkout-main/218277 "2022-02-15T18:06:00Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@pfaffman](https://meta.discourse.org/u/pfaffman)
#### Post date: [February 15, 2022, 6:06pm UTC](https://meta.discourse.org/t/rebuild-fails-because-still-on-master-branch-fix-with-git-checkout-main/218277/1 "2022-02-15T18:06:00Z")
I guess this missing `yarn` is the issue? I don’t what what could be causing it or anything else that might be an explanation…
```plaintext
discourse-checklist is already at latest compatible version
discourse-spoiler-alert is already at latest compatible version
discourse-affiliate is already at latest compatible version
I, [2022-02-15T18:02:48.675851 #1] INFO -- : > cd /var/www/discourse && su discourse -c 'bundle exec rake db:migrate'
I, [2022-02-15T18:02:55.018972 #1] INFO -- :
I, [2022-02-15T18:02:55.019167 #1] INFO -- : > cd /var/www/discourse && su discourse -c 'bundle exec rake themes:update assets:precompile'
sh: 1: yarn: not found
I, [2022-02-15T18:03:00.609631 #1] INFO -- : Checking 'Easy Footer (TH)' for 'default'... up to date
Checking 'discourse-user-field-prompt' for 'default'... up to date
Checking 'Rotate Global Banner(JP)' for 'default'...
FAILED
--------------------
Pups::ExecError: cd /var/www/discourse && su discourse -c 'bundle exec rake themes:update assets:precompile' failed with return #
Location of failure: /pups/lib/pups/exec_command.rb:112:in `spawn'
exec failed with the params {"cd"=>"$home", "hook"=>"assets_precompile", "cmd"=>["su discourse -c 'bundle exec rake themes:update assets:precompile'"]}
d6ac4e7c27174dd04269576be15628207fe7d8d19f99c6ea524836f8ee43b895
**FAILED TO BOOTSTRAP** please scroll up and look for earlier error messages, there may be more than one.
./discourse-doctor may help diagnose the problem.
```
---
### Author:  [@Falco](https://meta.discourse.org/u/Falco)
#### Post date: [February 15, 2022, 6:30pm UTC](https://meta.discourse.org/t/rebuild-fails-because-still-on-master-branch-fix-with-git-checkout-main/218277/2 "2022-02-15T18:30:51Z")
Our base image ships with yarn for a while. What is the base image version you are running?
---
### Author:  [@pfaffman](https://meta.discourse.org/u/pfaffman)
#### Post date: [February 15, 2022, 6:52pm UTC](https://meta.discourse.org/t/rebuild-fails-because-still-on-master-branch-fix-with-git-checkout-main/218277/3 "2022-02-15T18:52:33Z")
I thought I was going crazy.
The issue was that this host was still on `master`; `git checkout main` has solved the problem.
I guess I should be doing a `git checkout main` on ~~all hosts~~ two-container hosts where the procedure is to bootstrap/destroy/start rather than rebuild ~~in case they’re old enough to need it~~.
---
### Author:  [@system](https://meta.discourse.org/u/system)
#### Post date: [March 17, 2022, 6:53pm UTC](https://meta.discourse.org/t/rebuild-fails-because-still-on-master-branch-fix-with-git-checkout-main/218277/4 "2022-03-17T18:53:25Z")
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