Cannot seem to run next build due to folder not being writeable

[nsylke]

So, I've recently started upgrading some of our sites that are running old versions of Next (5.x & 7.x) to the latest version. For this particular site, I am upgrading from 5.1.0 to 9.4.4.

Node: 12.16.3
OS: Mac 10.15.5

I am running into an issue when next build is running in our pipeline:

 > NODE_ENV=production next build
 > Build error occurred
 Error: > Build directory is not writeable. https://err.sh/vercel/next.js/build-dir-not-writeable
     at build (/var/www/node_modules/next/dist/build/index.js:1:7057)
     at <anonymous>
     at process._tickCallback (internal/process/next_tick.js:189:7)
     at Function.Module.runMain (module.js:696:11)
     at startup (bootstrap_node.js:204:16)
     at bootstrap_node.js:625:3
 npm ERR! code ELIFECYCLE
 npm ERR! errno 1
 npm ERR! [email protected] build: `NODE_ENV=production next build`
 npm ERR! Exit status 1
 npm ERR! 
 npm ERR! Failed at the [email protected] build script.
 npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
 npm ERR! A complete log of this run can be found in:
 npm ERR!     /root/.npm/_logs/2020-06-01T15_19_05_613Z-debug.log

The sites are still running an express server and the plan is to remove those in the near future, so I can get it to build with it still, that would be great. Otherwise, I will take the time to remove it.

Additionally, I noticed this error in our pipeline, when installing dependencies, which I don't get locally.

> @ampproject/[email protected] postinstall /var/www/node_modules/@ampproject/toolbox-optimizer
 > node lib/warmup.js
 AMP Optimizer ERROR Could not write cache file TypeError: Cannot read property 'writeFile' of undefined
     at FileSystemCache.set (/var/www/node_modules/@ampproject/toolbox-core/lib/FileSystemCache.js:64:17)
     at fetchLatestRuntimeData_ (/var/www/node_modules/@ampproject/toolbox-optimizer/lib/fetchRuntimeParameters.js:157:11)
     at <anonymous>
     at process._tickCallback (internal/process/next_tick.js:189:7)
 AMP Optimizer ERROR Could not write cache file TypeError: Cannot read property 'writeFile' of undefined
     at FileSystemCache.set (/var/www/node_modules/@ampproject/toolbox-core/lib/FileSystemCache.js:64:17)
     at fetchValidatorRules_ (/var/www/node_modules/@ampproject/toolbox-optimizer/lib/fetchRuntimeParameters.js:85:11)
     at <anonymous>
     at process._tickCallback (internal/process/next_tick.js:189:7)
 AMP Optimizer ERROR Could not write cache file TypeError: Cannot read property 'writeFile' of undefined
     at FileSystemCache.set (/var/www/node_modules/@ampproject/toolbox-core/lib/FileSystemCache.js:64:17)
     at downloadAmpRuntimeStyles_ (/var/www/node_modules/@ampproject/toolbox-optimizer/lib/fetchRuntimeParameters.js:207:13)
     at <anonymous>
     at process._tickCallback (internal/process/next_tick.js:189:7)
 AMP Optimizer Downloading latest AMP runtime data

Thanks!

[WebTerminator]

I have the same issue. It's just happening right now.

[developer0116]

same here

[jimu-liubin]

The same for me.

[pascalodek]

Bumped Next from 9.1.1 to 9.4.4 and encountered this error too. Reverted to 9.1.1 and build succeeded.

[markomilivojevic]

I had the same issue and solved it after updating node from version 8 to version 12. Found answer here #13091