On Sat, 27 Dec 2014 18:10:20 GMT, Russel Winder wrote:

|> dub
Target vibe-d 0.7.21 is up to date. Use --force to rebuild.
Target gtk-d:gtkd 2.4.2 is up to date. Use --force to rebuild.
Building arcamclient ~master configuration "application", build type debug.
Compiling using dmd...
Warning: -version=VibeDefaultMain will be required in the future to use vibe.d's default main(). Please update your build scripts.
Linking...
/usr/bin/ld: cannot find -levent
/usr/bin/ld: cannot find -levent_pthreads
/usr/bin/ld: cannot find -lssl
/usr/bin/ld: cannot find -lcrypto
collect2: error: ld returned 1 exit status
--- errorlevel 1

It means you don't have the C libraries installed.
You need libevent-dev libssl-dev. See vibe.d's README (additional setup on linux).