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The V1 build system is deprecated, and V2 is now the supported build system. V1 builds stop working on August 1, 2026, when access tokens stop working (V1 builds authenticate with E2B_ACCESS_TOKEN). Migrate to V2 before then to keep building.

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What changed

The e2b template build command that drove V1 builds is now a deprecation stub and exits immediately. The current build command is e2b template create, which authenticates with your E2B_API_KEY instead of the access token. Migrating to V2 is therefore also what keeps your builds working past the access token cutoff.

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How to migrate

Follow the V2 migration guide to move an existing template to the V2 build system. It covers three paths:
  • e2b template migrate to convert an existing e2b.toml and e2b.Dockerfile definition (recommended).
  • fromDockerfile() to keep using a Dockerfile, parsed into a V2 template.
  • fromImage() to reference a Docker image you build and push yourself.