npm starts to execute many prestart scripts

you can use && like this

"scripts": {
  "prestart": "coffee -c ./file1.coffee && coffee -c ./file2.coffee && coffee -c ./file3.coffee && coffee -c ./file4.coffee",
  "start": "node ./file1.js"
},

wrap them in a parent script

"scripts": {
  "prestart": "sh ./make-coffee.sh",
  "start": "node ./file1.js"
},

//make-coffee.sh
#!/bin/bash
coffee -c ./file1.coffee
coffee -c ./file2.coffee
coffee -c ./file3.coffee
coffee -c ./file4.coffee

or another (unix-only) solution is to run multiple commands. I don't know what happens if the early commands fail.

"scripts": {
  "prestart": "coffee -c ./file1.coffee; coffee -c ./file2.coffee; coffee -c ./file3.coffee; coffee -c ./file4.coffee",
  "start": "node ./file1.js"
},