I would like to use the options
os: win32 x64
So what do you want to do, specify less or more options?
:D Jokes aside, up until now almost no additional configuration can be specified.
What you can do, is access the
angular-cli folder inside
node_modules and modify LESS compiler configuration there.
Keep in mind, that after updating the
angular-cli you will have to reapply your changes.
The angular-cli team plans to make more configuration accessible in a future version (post final version).