Hello, I got this comment on the ArchLinux package : https://aur.archlinux.org/packages.php?ID=55582
So it seems the update of some ArchLinux package have broken M&MS.
I found out that adding "#include <unistd.h>" at the beginning of TreeStorageNode.cpp solves the problem.
Could you release a bugfix ou should I had the modification to the aur package itself?