How do I override qt designer's qt.conf file?

[shantzis62]

Greetings,
I work in an environment where we have multiple versions of
our custom widgets, each stored in their own library. I need to
be able to have it so that designer can use either one set of our
custom widget plugins or another.

While the qt.conf file seems to do this, it seems like designer is
only willing to look in the same directory in which the designer
binary resides.

I'm hoping there is some environment variable or command-line
argument to designer-qt4 that allows me to tell the program to
look at an alternate qt.conf file.

Thanks!