"make install" fails when re-installing

When trying to "make install" for a second time it fails like this:

 make[2]: Entering directory `/home/user/src/byobu/usr/bin'
 test -z "/home/user/.dotfiles/oh-my-zsh/plugins/byobu/bin" || /bin/mkdir -p "/home/user/.dotfiles/oh-my-zsh/plugins/byobu/bin"
  /usr/bin/install -c byobu byobu-config byobu-ctrl-a byobu-disable byobu-enable byobu-export byobu-janitor byobu-launch byobu-launcher byobu-launcher-install byobu-launcher-uninstall byobu-quiet byobu-reconnect-sockets byobu-select-backend byobu-select-profile byobu-select-session byobu-silent byobu-status byobu-status-detail byobu-shell '/home/user/.dotfiles/oh-my-zsh/plugins/byobu/bin'
 make install-exec-hook
 make[3]: Entering directory `/home/user/src/byobu/usr/bin'
 cd /home/user/.dotfiles/oh-my-zsh/plugins/byobu/bin && ln -s byobu byobu-screen
 ln: creating symbolic link `byobu-screen': File exists

It should maybe use "ln -sfn" instead.