Build: `next.config.ts` with TS import aliases / `baseUrl` fails
#1.512 geöffnet am 22.05.2026
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Beschreibung
This issue was created by an agent analysing CI failures from the Next.js Deploy Suite (vinext
mainvs Next.jsv16.2.6, 2026-05-22).
Problem
A next.config.ts that uses TS path aliases / baseUrl in CJS mode fails to build (Custom deploy script failed: undefined). Distinct from #1345 (__dirname redeclaration) — this is about TS path-alias resolution at config-load time.
next.config.ts with import aliases + baseUrl fails to build
Estimated Impact
~1 test failures across the deploy suite.
Affected Test Suites
test/e2e/app-dir/next-config-ts/import-alias-paths-with-baseurl/next-config-ts-import-alias-paths-with-baseurl-cjs.test.ts
Recommendation
-
Reproduce first in vinext's own test suite. Add a
next.config.tsthat imports a path alias viatsconfig'spaths. Confirm the build fails. -
Resolve TS aliases when loading
next.config.ts. When loading the config in CJS mode, readtsconfig.jsonpaths/baseUrland pass them to the TS loader so the config file can use aliased imports.
Part of #1328.