Automatically setting up pro.user file parameters

I have a "base project" that requires "make install" to be run after "make" so that other projects that depend on it can build and run correctly. All works well if in the base project I setup a "custom build step" to do the "make install"; however, I don't want to have to tell all the other developers to make sure they set up their QtCreator project correctly.

I am creating the install target in the PRO file with "INSTALLS+= blah blah" and I tried adding a "QMAKE_POST_LINK+=install" line, but this cause a recursive make loop or some such. Is there some other way to indicate this type "pro.user" setup in the PRO file or maybe in some other way?

thanks in advance!