> Also note that generations are generally lightweight It's right. But I have another problem with different generations: I build and install xfce4-cpugraph-plugin
/gnu/store/qf0khvz9vj5lj4k9sfjxqlbs0kl8ssr3-xfce4-cpugraph-plugin-1.0.5/ ├── lib │ └── xfce4 │ └── panel │ └── plugins │ ├── libcpugraph.la │ └── libcpugraph.so ... of course xfce-panel does not see libcpugraph.so /gnu/store/rp40p839f65bzkkzrgcx7jbxb0c38nx4-xfce4-panel-4.12.0/ ├── bin ... │ └── xfce4 │ └── panel │ ├── migrate │ ├── plugins │ │ ├── libactions.la │ │ ├── libactions.so │ │ ├── libapplicationsmenu.la │ │ ├── libapplicationsmenu.so │ │ ├── libclock.la │ │ ├── libclock.so │ │ ├── libdirectorymenu.la │ │ ├── libdirectorymenu.so │ │ ├── liblauncher.la │ │ ├── liblauncher.so │ │ ├── libpager.la │ │ ├── libpager.so │ │ ├── libseparator.la │ │ ├── libseparator.so │ │ ├── libshowdesktop.la │ │ ├── libshowdesktop.so │ │ ├── libsystray.la │ │ ├── libsystray.so │ │ ├── libtasklist.la │ │ ├── libtasklist.so │ │ ├── libwindowmenu.la │ │ └── libwindowmenu.so │ ├── wrapper-1.0 │ └── wrapper-2.0 ... Problem! Probably I should to modify the "xfce" package itself, but it's not so easy for me.