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sbt 1.9.5

Update: ⚠️ sbt 1.9.5 is broken, because it causes Scala compiler to generate wrong class names for anonymous class on lambda. Please refrain from publishing libraries with it while we investigate. See cala/bug#12868 for details.

Hi everyone. On behalf of the sbt project, I’m happy to announce sbt 1.9.5 patch release is available. Full release note is here -

See 1.9.0 release note for the details on 1.9.x features.


How to upgrade

The sbt version used for your build must be upgraded by putting the following in project/


This mechanism allows that sbt 1.9.5 is used only for the builds that you want.

Download the official sbt runner from, cs setup, SDKMAN, or download from to upgrade the sbt shell script and the launcher.

Other updates


Thanks to everyone who’s helped improve sbt and Zinc by using them, reporting bugs, improving our documentation, porting builds, porting plugins, and submitting and reviewing pull requests.

For anyone interested in helping sbt, there are many avenues for you to help, depending on your interest. If you’re interested, Contributing, “help wanted”, “good first issue”, and Discussions are good starting points.

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