As of the time of this writing, Cloudflare Workers CI does not work with the newer text-based bun.lock
file and instead requires a bun.lockb
file to build your app via their CI system.
This usually manifests itself with the following error when trying to deploy your apps using a bun.lock
file:
13:48:54.691 Initializing build environment...
13:49:02.821 Success: Finished initializing build environment
13:49:03.776 Cloning repository...
13:49:08.079 Detected the following tools from environment: [email protected], [email protected]
13:49:08.080 Installing bun 1.2.20
13:49:10.103 Installing project dependencies: bun install --frozen-lockfile
13:49:10.197 bun install v1.2.20 (282dda62)
13:49:10.213 error: lockfile had changes, but lockfile is frozen
13:49:10.214 note: try re-running without --frozen-lockfile and commit the updated lockfile
13:49:10.220 Failed: error occurred while installing tools or dependencies
To get bun.lock
files to work, you have to do two things:
Add the following to your to your build config variables (Settings -> Build -> Variables and secrets
):
SKIP_DEPENDENCY_INSTALL=true
BUN_VERSION=1.2.20
(or whatever version you want to use)

In your build command (Settings -> Build -> Build configuration
), add bun install
as the first step, before any build commands or deploy scripts.
This will use the now setup bun version and install dependencies using your bun.lock
file.
