Using Bun & Next 13.5.6

Running either next build or bunx next build locally works fine, but the build on Vercel fails with the following error:

TypeError: Cannot read properties of undefined (reading 'ReactJsxRuntime')
    at 12616 (/vercel/path0/.next/server/chunks/977.js:1:110651)
    at __webpack_require__ (/vercel/path0/.next/server/webpack-runtime.js:1:146)
    at 10057 (/vercel/path0/.next/server/chunks/556.js:1:7630)
    at Function.__webpack_require__ (/vercel/path0/.next/server/webpack-runtime.js:1:146)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async collectGenerateParams (/vercel/path0/node_modules/next-auth/node_modules/next/dist/build/utils.js:858:17)
    at async /vercel/path0/node_modules/next-auth/node_modules/next/dist/build/utils.js:1074:17
    at async Span.traceAsyncFn (/vercel/path0/node_modules/next-auth/node_modules/next/dist/trace/trace.js:105:20)

> Build error occurred
Error: Failed to collect page data for /_not-found
    at /vercel/path0/node_modules/next-auth/node_modules/next/dist/build/utils.js:1178:15
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5) {
  type: 'Error'
}
error: script "build" exited with code 1 (SIGHUP)
Error: Command "bun run build" exited with 1

I've tried dozens of things but I can't seem to figure out the problem.