Stefano has just posted a changes in distribution-spesific mailing list about changes in how MATE releases is build for distributions. Future MATE source code releases will be created with make dist, thus changes how we build our package.
In the past, we used autogen.sh to build it, but since today, it will be replaced by the normal ./configure script. The first package migrated is mate-doc-utils which is now upgraded to 1.6.1 and have been pushed to our primary mirror site in http://www.slackware.org.uk/msb/. More package update will follow when they have been released in MATE's Public Repository.
For those who have been using our binary packages, you will not see any differences and can continue to use and upgrade it using upgradepkg command like you normally did.