I am upgrading from v1.0.7-1
I am building from zcash source on Ubuntu 16.
I checked out the new v1.0.8 branch following the upgrade steps in 1.0 User Guide
However, I ran into a problem.
Note, that "make clean" will fail due to missing dependency "libevent".
I tried "sudo apt-get install libevent-2.0 libevent-dev"
This did not fix the dependency issue.
Long story short...these steps worked around the issue and "fetched" what was required.
Second, "make clean"
now running zcash v1.0.8 awesome!