allow changing build artifacts root, with appropriate warnings
allow changing build artifacts root, with appropriate warnings

ifreecarve/Illuminator,drptbl/Illuminator,paypal/Illuminator,drptbl/Illuminator,drptbl/Illuminator,ifreecarve/Illuminator,ifreecarve/Illuminator,ifreecarve/Illuminator,paypal/Illuminator,drptbl/Illuminator