# BUILD_STRICT_WARNINGS

`nextly build --strict` found validation warnings, and `--strict` fails the build on any warning.

## Cause

`nextly build --strict` found validation warnings, and `--strict` fails the build on any warning.

`nextly build` reports validation warnings, such as a relationship to a collection the config does not define, and continues. With `--strict` any warning fails the build, so CI can hold the configuration to having none.

## Fix

* Fix each warning the Why line lists in `nextly.config.ts`, then run `nextly build --strict` again.
* If the warnings are expected, run `nextly build` without `--strict`.

## Example

```text
✗ Build failed due to 1 warning (--strict mode).
  Why:  Collection "posts" field "author": relationship target "people" is not defined in this config.
  Next: Fix each warning listed, or run `nextly build` without `--strict` to let warnings pass.
  Docs: https://nextlyhq.com/docs/cli/errors/build-strict-warnings  (BUILD_STRICT_WARNINGS)
```