Windows 'start' command not executing with child_process.exec in VS Code plugin

I am trying to start a program from a VS Code plugin through the child_process.exec() function but the program doesn't start. If I execute the same command from the cmd shell directly, the program runs normally...

I build the command like this:

var cmd ='start /d "' + process.env['DECKARD_PATH'] + '"' + " /b Deckard.exe"
// cmd resolves to 'start /d "C:\Program Files (x86)\Deckard" /b Deckard.exe'

and then try to execute:

child_process.exec(cmd, (err, stdout, stderr) => {
  // Some stuff but no errors are triggered...
})

Note that Deckard.exe is an electron application with Windows UI.

Any suggestions would be greatly appreciated. Thanks in advance.

via Pascal Gula