I think there's a problem.
[ 88%] Building CXX object src/CMakeFiles/mineserver.dir/worldgen/nethergen.cpp.o
/tmp/yaourt-tmp-rpuser/aur-mineserver-git/src/mineserver/src/worldgen/nethergen.cpp: In member function ‘virtual void NetherGen::AddOre(int, int, int, uint8_t)’:
/tmp/yaourt-tmp-rpuser/aur-mineserver-git/src/mineserver/src/worldgen/nethergen.cpp:410:3: warning: ‘count’ may be used uninitialized in this function [-Wmaybe-uninitialized]
Linking CXX executable ../bin/mineserver
/usr/bin/ld: CMakeFiles/mineserver.dir/tools.cpp.o: undefined reference to symbol 'clock_gettime@@GLIBC_2.4'
/usr/bin/ld: note: 'clock_gettime@@GLIBC_2.4' is defined in DSO /lib/librt.so.1 so try adding it to the linker command line
/lib/librt.so.1: could not read symbols: Invalid operation
collect2: error: ld returned 1 exit status
make[2]: *** [bin/mineserver] Error 1
make[1]: *** [src/CMakeFiles/mineserver.dir/all] Error 2
make: *** [all] Error 2
==> ERROR: A failure occurred in build().
Aborting...
==> ERROR: Makepkg was unable to build mineserver-git.
==> Restart building mineserver-git ? [y/N]
==> ---------------------------------------