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A “missing Storybook” failure in Chromatic CI can mean several different things: the CLI cannot find the build script, Storybook’s production build fails, the output directory is not a valid built Storybook, or a dependency is missing when stories render. Check the exact CLI message first, then reproduce the production build locally; do not assume the problem is a Chromatic service issue.
Identify which “missing Storybook” failure you have
Chromatic reports distinct failure categories, including a missing build script, a failed or unsuccessful Storybook start, an invalid Storybook build, and a missing dependency. The precise log message determines which branch to follow. A generic CI failure alone does not establish that the build script is missing. See Chromatic’s CLI troubleshooting guide.
| Observed failure | First check | Next action |
|---|---|---|
| “Build script not found” | Does package.json define the expected build script? |
Add the script or configure its actual name with buildScriptName. For a custom command, configure buildCommand and the output directory. |
| “Failed to build Storybook” or a similar build error | Does the production build fail locally? | Resolve the Storybook build error, then rerun Chromatic. |
| Missing or undefined dependency while stories render | Is the package declared, installed, and included in the bundler configuration? | Correct the dependency or configuration; use Storybook Doctor to check for consistency problems. |
| Invalid or unusable built Storybook | Does the configured output directory contain a valid production Storybook? | Build and serve it locally. If that succeeds, point Chromatic to that directory explicitly. |
| Cause remains unclear | Have you reproduced the production build and checked the relevant configuration? | Rerun with debug and diagnostics enabled, and retain the logs. |
Reproduce the production build locally
Chromatic’s visual testing workflow uses a production Storybook build, which can expose errors that do not appear in storybook dev. Run the same build command your repository or CI uses. Chromatic’s documented example is:
npm run build-storybook
npx http-server storybook-static -oUse your project’s actual command and output directory if they differ. Serving the generated directory lets you check that the built Storybook opens and its stories load, rather than relying on the development server as a substitute. Chromatic’s quickstart explains the production-build workflow.
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Fix a missing build script or configure a custom build
Use the standard package script
Chromatic’s default is the build-storybook script. A typical package script invokes storybook build. Check the scripts in package.json and make sure the command runs in CI with the repository’s installed dependencies.
Tell Chromatic the real script name
If your package uses a different script name, set buildScriptName in Chromatic’s configuration or pass --build-script-name to the CLI. This is for changing which package script Chromatic runs; it is not the same as handing Chromatic an already-built directory.
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Use a custom build command
If the build is not a package script, configure buildCommand and specify the directory where that command writes the Storybook output. Check the current option syntax in Chromatic’s configuration reference.
Resolve production build and dependency errors
If the local production build fails, fix that error before changing Chromatic settings. Chromatic’s CLI guidance says of a failed Storybook build: “This is a problem with your Storybook build, not with Chromatic.”
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For an undefined reference or missing package during production rendering, check that the dependency is declared in the project, installed in the CI environment, and included correctly by the bundler configuration. A dependency that happens to be available in a local development setup may still be absent from the production build.
For project consistency issues, run Storybook Doctor:
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npx storybook@latest doctorChromatic’s quickstart says that, from Storybook 7.6 onward, Doctor can detect issues such as mismatched Storybook versions, duplicated dependencies, and incompatible addons. Treat its output as a diagnostic aid—not proof that every build error is a version conflict.
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If a separate local build succeeds and you want Chromatic to use that output, set storybookBuildDir in configuration or pass --storybook-build-dir. Confirm that the path points to the actual generated, valid Storybook directory. This option supplies built output; it does not rename a package script or define a custom build command. The configuration reference documents these options.
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Collect diagnostics when the cause is still unclear
After reproducing the failure and checking the relevant script, build, dependencies, and output path, run the CLI with debugging and diagnostics enabled:
npx chromatic --project-token=<TOKEN> --dry-run --debug --diagnostics-fileKeep the CI log and generated diagnostics file. Chromatic’s configuration reference also documents a Storybook log-file option, which can help preserve build details for investigation.
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