Version 6.x+ only supports sbt 1.4+. Keep using 5.2.4 or older for previous versions of sbt. Be aware the groupId and artifact name changed a well:

// For sbt versions >= 1.4.0
addSbtPlugin("com.github.sbt" % "sbt-eclipse" % "6.0.0")

// For older sbt versions (< 1.4.0)
addSbtPlugin("com.typesafe.sbteclipse" % "sbteclipse-plugin" % "5.2.4")

What's Changed

• Improved support for multiple scala versions by @daenenk in https://github.com/sbt/sbt-eclipse/pull/356
• Update README.md by @hyviquel in https://github.com/sbt/sbt-eclipse/pull/366
• Add support for Java Execution Environments 9, 10, 11, 12, 13 by @kebeda in https://github.com/sbt/sbt-eclipse/pull/371
• Sync EclipseExecutionEnvrironment enumeration with valueSeq (see #371) by @kebeda in https://github.com/sbt/sbt-eclipse/pull/373
• Update scalaz-core, scalaz-effect to 7.2.34 by @scala-steward in https://github.com/sbt/sbt-eclipse/pull/386
• Update scalatest to 3.0.9 by @scala-steward in https://github.com/sbt/sbt-eclipse/pull/385
• Update sbt-scalariform to 1.8.3 by @scala-steward in https://github.com/sbt/sbt-eclipse/pull/384
• Update scala-xml to 1.3.0 by @scala-steward in https://github.com/sbt/sbt-eclipse/pull/382
• Update scala-library to 2.12.15 by @scala-steward in https://github.com/sbt/sbt-eclipse/pull/381
• Update sbt-bintray to 0.5.6 by @scala-steward in https://github.com/sbt/sbt-eclipse/pull/380
• Update sbt-git to 1.0.2 by @scala-steward in https://github.com/sbt/sbt-eclipse/pull/379
• Update sbt-release to 1.0.13 by @scala-steward in https://github.com/sbt/sbt-eclipse/pull/378
• Update sbt-release to 1.0.15 by @scala-steward in https://github.com/sbt/sbt-eclipse/pull/387
• Update sbt-bintray to 0.6.1 by @scala-steward in https://github.com/sbt/sbt-eclipse/pull/389
• Update scala-library to 2.13.8 by @scala-steward in https://github.com/sbt/sbt-eclipse/pull/390
• Update scalatest to 3.2.12 by @scala-steward in https://github.com/sbt/sbt-eclipse/pull/392
• Update scalaz-core, scalaz-effect to 7.3.6 by @scala-steward in https://github.com/sbt/sbt-eclipse/pull/393
• setup GitHub Actions by @benmccann in https://github.com/sbt/sbt-eclipse/pull/394
• Update scala-library to 2.12.16 by @scala-steward in https://github.com/sbt/sbt-eclipse/pull/396
• Update sbt-git to 2.0.0 by @scala-steward in https://github.com/sbt/sbt-eclipse/pull/388
• Compatibility with sbt 1.4+ by @mkurz in https://github.com/sbt/sbt-eclipse/pull/402
• Remove scalariform and scala-xml by @mkurz in https://github.com/sbt/sbt-eclipse/pull/403

:heart: Thanks to our premium sponsors!

If you find this OSS project useful for work, please consider asking your company to support it by becoming a sponsor. You can also individually sponsor the project by becoming a backer.

:bow: Thanks to our contributors

Finally, thanks to the community for their help with detailed bug reports, discussions about new features and pull request reviews. This project is only possible due to the help we had from amazing contributors. Special thanks to all code contributors who helped with this particular release (they are listed below)!

New Contributors

• @daenenk made their first contribution in https://github.com/sbt/sbt-eclipse/pull/356
• @hyviquel made their first contribution in https://github.com/sbt/sbt-eclipse/pull/366
• @kebeda made their first contribution in https://github.com/sbt/sbt-eclipse/pull/371
• @scala-steward made their first contribution in https://github.com/sbt/sbt-eclipse/pull/386

Full Changelog: https://github.com/sbt/sbt-eclipse/compare/v5.2.4...6.0.0