NextJS - If package.json has build: next build firebase deploy will fail

[atco-jh]

The package.json cannot have the build: next build script or firebase function will fail to deploy. This is very reproducible and happens every time.

example package.json

    "scripts": {
        "dev": "next dev",
        "build": "next build"
    }

I've encountered this error when it's the final stages when the function is building.

Error: Could not find 'pages' directory , which is very vague and confusing, but after figuring out a lot of issues , I am perplexed why this is an issue.

I am using src/pages folder structure in NextJS.

firebase.json

{
    "hosting": {
        "source": ".",
        "cleanUrls": true,
        "ignore": ["firebase.json", "**/.*", "**/node_modules/**", "functions/"],
        "rewrites": [
            {
                "source": "**",
                "function": "ssrNextFunc"
            },
            {
                "source": "**/**",
                "function": "ssrNextFunc"
            }
        ],
        "headers": [
            {
                "source": "**",
                "headers": [
                    {
                        "key": "Strict-Transport-Security",
                        "value": "max-age=63072000; includeSubDomains; preload"
                    }
                ]
            }
        ]
    }
}

There seems to be a mismatch somewhere as if you try to override this with anything else eg. build: next build src/ it will say this command will be ignored and firebase will use it's default and deploy will work.

BUT if it's build: next build, this doesn't get ignored, so I assume this means it must be matching firebase's build script, but the frustrating thing is that this will fail the deploy, and I do not know why for the life of me.

[gyak-efisco]

suddenly having the same issue on project that was perfectly deployable a couple of days ago