child_process.exec(pdftk) works perfectly in DEV mode... but doesn't work anymore after BUILD ??? (mac OS)

[rrigaud]

Hi, I've got a problem using an external library through child_process.exec (with pdftk).
My code :
const { exec } = require('child_process'); ... exec('pdftk pdfsource.pdf burst output ...)

When I use it in DEV mode, it works perfectly !
But when I build my package to MyAPP.app and launch my app, I can intercept an error :
/bin/sh: pdftk: command not found

Why my Mac doesn't find the pdftk library when launched through my packaged App ?

• It works from a command line
• it works from my Dev App

Could somebody please help me ?
Thanks a lot.