Worker path resolution inconsistency between dev and build modes

[kmate19]

What version of Bun is running?

1.1.42+50eec0025

What platform is your computer?

Linux 5.15.153.1-microsoft-standard-WSL2 x86_64 unknown

What steps can reproduce the bug?

Here’s a minimal reproduction of the issue:

Create a src/index.ts file:

console.log("Starting app...");

new Worker(new URL("./workers/worker.ts", import.meta.url).href);

Create a src/workers/worker.ts file:

console.log("Hello from the worker!");

Run the following commands:
Development Mode:

bun run ./src/index.ts --watch

Build Mode:

bun build --sourcemap --minify --compile --outfile ./dist/output --target bun ./src/index.ts ./src/workers/worker.ts
./dist/output

What is the expected behavior?

According to the Bun documentation, any of the following should work for worker paths, consistently across both dev and build modes:

new Worker("./workers/emailWorker.ts");
new Worker(new URL("./workers/emailWorker.ts", import.meta.url));
new Worker(new URL("./workers/emailWorker.ts", import.meta.url).href);

The worker file should resolve correctly and execute without errors in both modes.

What do you see instead?

Development Mode:
Running bun run ./src/index.ts --watch produces the following:

Hello from the worker!

Running

bun build --sourcemap --minify --compile --outfile ./dist/output --target bun ./src/index.ts ./src/workers/worker.ts
./dist/output

gives the following:

1 | new Worker(new URL("./workers/worker.ts", import.meta.url).href);
    ^
TypeError: BuildMessage: ModuleNotFound resolving "/$bunfs/root/workers/worker.ts" (entry point)
      at src/index.ts:1:1

Bun v1.1.42 (Linux x64)

Additional information

Would love clarification on whether this is a bug or intended behavior. Thank you!