apt-cache search '^valac-[0-9.]+$' | sort -n -r | head -n 1 | awk ' { print "sudo apt-get install " $1  }' | sh
apt-cache search '^valac-[0-9.]+-vapi$' | sort -n -r | head -n 1 | awk ' { print "sudo apt-get install " $1  }' | sh
apt-cache search '^libvala-[0-9.]+-dev$' | sort -n -r | head -n1 | awk ' { print "sudo apt-get install " $1  }' | sh