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Editorial Team
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Asked: 2026-06-03T15:10:58+00:00

I have a specific problem but the solutions are hopefully probably generic for similar

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I have a specific problem but the solutions are hopefully probably generic for similar problems.

I have a Play! framework 2.0 project, using Scala.

I am trying to deploy a new version to Heroku.

However for this project the deployment fails as the slug size is too big (101MB).

Now this app is very simple, so it is most likely a configuration problem. The current deployed version is/was using Play! 2.0-RC3 and the one I am trying to deploy is using version 2.0. That may be an issue?

I have tried to use a .slugignore file, ignoring .ivy2, project/boot etc, but to no avail.

Any other suggestions for how to reduce the slug size? When Using Play 2.x and Scala?

Here is the git push output (excluding the Selenium dependencies is probably a start)

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1 Answer

  1. Editorial Team

    Just follow the instructions on the bottom of this page. You simply fork https://github.com/heroku/heroku-buildpack-scala and change the bin/compile script towards its end as described in the Finetunig section.

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