Netlify deploy previews are failing to build

[jmhbnz]

Recently our netlify deploy previews have been failing to build, example https://app.netlify.com/sites/etcd/deploys/647c5d107e85bc000792009c

Logs state:

9:45:30 PM: make: *** [Makefile:25: get-link-checker] Error 2
9:45:30 PM: ​
9:45:30 PM: "build.command" failed                                        
9:45:30 PM: ────────────────────────────────────────────────────────────────
9:45:30 PM: ​
9:45:30 PM:   Error message
9:45:30 PM:   Command failed with exit code 2: npm run build:preview (https://ntl.fyi/exit-code-2)
9:45:30 PM: ​
9:45:30 PM:   Error location
9:45:30 PM:   In build.command from netlify.toml:
9:45:30 PM:   npm run build:preview
9:45:30 PM: ​
9:45:30 PM:   Resolved config
9:45:30 PM:   build:
9:45:30 PM:     command: npm run build:preview
9:45:30 PM:     commandOrigin: config
9:45:30 PM:     environment:
9:45:30 PM:       - REVIEW_ID
9:45:30 PM:     publish: /opt/build/repo/public
9:45:30 PM:     publishOrigin: config
9:45:31 PM: Build failed due to a user error: Build script returned non-zero exit code: 2
9:45:31 PM: Failing build: Failed to build site

However when I run npm install followed by npm run build:preview the process completes sucessfully.

@nate-double-u - Any ideas what might be going on here? If you can shed any light on what might be going wrong I'm happy to work on whatever fix is required 🙏🏻

[nate-double-u]

It looks like the link checker is failing. As a workaround to get things going again we could disable it, but we should do an investigation as to why it's stopped (Especially since it seems to be working locally).

/cc @chalin

[chalin]

Looking into it now.