[eyelidlessness]

Bun internally treats most CJS modules as ESM, mapping require() calls to synchronous import() etc. And ESM is always strict mode, so that might be the issue?

[Jarred]

This used to be true, but now it transpiles to CommonJS with sloppy mode by default when "exports" or "module" is used

[rfalon]

Bun is not able to run non-strict javascript and there is no documentation that suggests it will be supported. No choice other than running Node.JS for this.