Since roxterm 3.0 it has dropped GTK2 support, so please be aware of the dependency change.
By the way, roxterm is now built with vte 2.91(REAL version is 0.38+), previously was 2.90. There is an API change inside VTE, roxterm has been ported to new API gracefully.
sudo dnf upgrade --refresh --advisory=FEDORA-2015-15342
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