error with pngquant

Hi, I am trying to deploy to Google App Engine (node). This code works fine locally and on Heroku. However on GAE, I get the following build error and the code dosnt run. I have not been able to work out how to apply the suggested fix “make sure that libpng-dev is installed”

pngquant-bin@3.1.1 postinstall /app/node_modules/pngquant-bin node lib/install.js

ÔÜá The /app/node_modules/pngquant-bin/vendor/pngquant binary doesn’t seem to work correctly ÔÜá pngquant pre-build test failed Ôä╣ compiling from source Ô£û Error: pngquant failed to build, make sure that libpng-dev is installed at ChildProcess.exithandler (child_process.js:202:12) at emitTwo (events.js💯13) at ChildProcess.emit (events.js:185:7) at maybeClose (internal/child_process.js:850:16) at Process.ChildProcess._handle.onexit (internal/child_process.js:215:5)

[sebastiendan]

This issue should stay open anyway, shouldn’t it?

[callmecavs]

@danb-cws @sebastiendan this error has something to do with the pngquant quality setting, as lowering that - from 90 to 80 - fixed this issue for me.

My guess is a high quality setting leads to pngquant taking forever, which leads to execa timing out and throwing an error prematurely.

Updated: running the build in a CI setup caused it to fail with quality at 80. likely because the vm is slower.