You can now build applications with Paketo builders based on Ubuntu 26.04 Long Term Support (LTS), also known as Resolute Raccoon.

Builder source and images live in the ubuntu-resolute-builder repository. See the releases page for published tags.

Available builders:

• paketobuildpacks/ubuntu-resolute-builder (includes buildpacks for Java, Node.js etc.)
• paketobuildpacks/ubuntu-resolute-builder-buildpackless (no buildpacks included)

These builders can create application images based on the Ubuntu Resolute run images. Published run images are listed on the releases page:

• paketobuildpacks/ubuntu-resolute-run default
• paketobuildpacks/ubuntu-resolute-run-tiny
• paketobuildpacks/ubuntu-resolute-run-static

no-stacks base images

• paketobuildpacks/ubuntu-resolute-run-no-stacks default
• paketobuildpacks/ubuntu-resolute-run-tiny-no-stacks
• paketobuildpacks/ubuntu-resolute-run-static-no-stacks

Images with the no-stacks suffix match the standard base images but omit io.buildpacks.stack.id from image metadata. Use them while you test the move from stacks to base images, as stacks are deprecated.

Using the Resolute builders

You need the Pack CLI installed.

A sample application

git clone https://github.com/paketo-buildpacks/samples

To build with the Resolute builder:

pack build nodejs-app \
    --path ./samples/nodejs/no-package-manager \
    --builder paketobuildpacks/ubuntu-resolute-builder

When the build finishes, the logs should include:

Successfully built image nodejs-app

Run the application

docker run -d -p 8080:8080 nodejs-app

Verify the application responds:

curl http://localhost:8080

If you receive HTTP/1.1 200 OK, the application is running.

For a smaller application image, set the tiny run image with --run-image:

pack build nodejs-app \
    --path ./samples/nodejs/no-package-manager \
    --builder paketobuildpacks/ubuntu-resolute-builder \
    --run-image paketobuildpacks/ubuntu-resolute-run-tiny

Conclusion

If you would like to contribute to the Paketo implementation of Cloud Native Computing Foundation (CNCF) buildpacks, see the community instructions on how to get involved or read this blog post on the topic.

Happy building!