When installing plugin files are installed to /usr/local/lib64/xfce4/panel-plugins/ when all of my other plugins correctly installed to /usr/lib64/xfce4/panel-plugins/. Reproducible: Didn't try Steps to Reproduce: 1. make application 2. install application 3. Actual Results: Files were installed in /usr/local/lib64/panel-plugins/ by default. Expected Results: Install files into /usr/lib64/xfce4/panel-plugins/ by default. Gentoo AMD64 install
That's what the --prefix option to configure is for. /usr/local is usually the default for source installs in most packages.