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Add a note to warn users to peg to specific versions of buildpacks #1882

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Jan 25, 2016
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Add a note to warn users to peg to specific versions of buildpacks #1882

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9 changes: 7 additions & 2 deletions docs/deployment/buildpacks.md
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Expand Up @@ -16,6 +16,9 @@ To use a specific buildpack, you can run the following dokku command:
# replace APP with the name of your application
# replace REPOSITORY_URL with your buildpack's url
dokku config:set APP BUILDPACK_URL=REPOSITORY_URL

# example: using a specific ruby buildpack version
dokku config:set APP BUILDPACK_URL=https://github.com/heroku/heroku-buildpack-ruby.git#v142
```

Please check the documentation for your particular buildpack as you may need to include configuration files (such as a Procfile) in your project root.
Expand All @@ -25,10 +28,12 @@ Please check the documentation for your particular buildpack as you may need to
You can only set a single buildpack using the `BUILDPACK_URL`, though there may be times when you wish to use multiple buildpacks. To do so, simply create a `.buildpacks` file in the base of your repository. This file should list all the buildpacks, one-per-line. For instance, if you wish to use both the `nodejs` and `ruby` buildpacks, your `.buildpacks` file should contain the following:

```shell
https://github.com/heroku/heroku-buildpack-nodejs.git
https://github.com/heroku/heroku-buildpack-ruby.git
https://github.com/heroku/heroku-buildpack-nodejs.git#v87
https://github.com/heroku/heroku-buildpack-ruby.git#v142
```

> Always remember to pin your buildpack versions when using the multi-buildpacks method, or you may find deploys changing your deployed environment.

You may also choose to set just a single buildpack in this file, though that is up to you.

Please check the documentation for your particular buildpack(s) as you may need to include configuration files (such as a Procfile) in your project root.
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