I am not sure. If I interpret the Qt documentation right, this should build (and thus install) the docs to the path in `QT_INSTALL_DOCS`. But before installing it would be progress, if the Formula doesn't break at this point :). The reason I don't test it is: I have a running installation of Qt 5.2 in use and don't want to spend another night just compiling it and check if everything went alright. But ... if there's a way to install it to another location I could test it.