I found it's always difficult to find a compatible version, that is: compatible to the installed dynmap AND griefprevention version. I even tried to compile the fork from eccentricdevotion (can't open a new issue there), but that fails with "Failure to find org.bukkit:bukkit:jar:1.8-R0.1-SNAPSHOT". As the bukkit-repo has no reference for 1.8 or higher, I understand that this could not work.
At the moment I'm running GriefPrevention v9.9, so I think even eccentricdevotion's version will not run on my server. Could someone help me to getting the compile working? I'm no expert in programming (yet), but I'm eager to learn!

Where did you get the GriefPrevention version from:? Is it d.b.o, or someplace else?

Ah, yeah, it has been from dbo. Today I'm on 10.4:
[11:30:40] [Server thread/INFO]: [GriefPrevention] Enabling GriefPrevention v10.5
as CraftBukkitUptodate (also from dbo) regularly fetches the latest (stable) version.