USE flags per app

hi

for example unity-editor flags android and webgl are disabled. in cl i use USE=“android webgl” emerge -av unity-editor and it compiles with those 2 flags. i put dev-util/unity-editor android webgl in file custom in dir /etc/portage/package.use. only question i have is is this correct? will calculate linux update app use those 2 flags next time unity has an update or not?
i hope i wrote this clear enough to understand it…

thanks

Yes that’s right. During the update, if there is no binary file with such flags, the package will be compiled.