I have in my package.json the following
\"scripts\": {
...
\"prod\": \"gulp build --production && webpack --env.config=production\"
}
If you're using Bash you can use a function in your npm-script.
For instance:
"scripts": {
...
"prod": "func() { gulp build --production \"$1\" && webpack --env.config=production \"$1\"; }; func"
}
However, for a cross-platform solution you'll need to consider invoking a nodejs script which exec's the commands - in a similar way shown in Solution 2 of my answer here.