# How long does rebuilding take?

**URL:** <https://meta.discourse.org/t/how-long-does-rebuilding-take/46189>\
**Category:** Product Support\
**Created:** [June 22, 2016, 2:09pm UTC](https://meta.discourse.org/t/how-long-does-rebuilding-take/46189 "2016-06-22T14:09:59Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![clay](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/clay/32/102156_2.png) [@clay](https://meta.discourse.org/u/clay)\
**Post date:** [June 22, 2016, 2:11pm UTC](https://meta.discourse.org/t/how-long-does-rebuilding-take/46189/2 "2016-06-22T14:11:09Z")

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That’s a routine warning. You should try `./launcher rebuild app` after changing `app.yml`. You may also need to run it twice, if it needs to pull down the base image again.

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