Since this is an issue, I will add this to the Masternode guide today.

If you have < 2GB of RAM on the system, you won’t be able to compile Sucre.  We’ll have to set up a swapfile.  If you have the required 2GB, feel free to skip ahead.

cd /var
touch swap.img
chmod 600 swap.img

dd if=/dev/zero of=/var/swap.img bs=1024k count=2000

#Preparing the Disk Image

mkswap /var/swap.img

#Star
swapon /var/swap.img

#Enable your Swap File During Boot

echo "/var/swap.img    none    swap    sw    0    0" >> /etc/fstab

# type free to see if it's working
free