Building Rosetta PROBLEM

I would like to build Rosetta and learn to use it to find ab initio structures results from my research.
When I try to build Rosetta with 'scons bin mode=release' I receive this response:

scons: Reading SConscript files ...
sh: svnversion: not found
sh: svn: not found
scons: done reading SConscript files.
scons: Building targets ...
g++ -o build/src/release/linux/2.6/64/x86/gcc/protocols/loops/LoopRelaxMover.os -c -std=c++98 -pipe -ffor-scope -W -Wall -pedantic -Wno-long-long -O3 -ffast-math -funroll-loops -finline-functions -finline-limit=20000 -s -Wno-unused-variable -fPIC -DNDEBUG -Isrc -Iexternal/include -Isrc/platform/linux/64/gcc -Isrc/platform/linux/64 -Isrc/platform/linux -Iexternal/boost_1_38_0 -I/usr/local/include -I/usr/include src/protocols/loops/LoopRelaxMover.cc
src/protocols/loops/LoopRelaxMover.cc: In member function 'virtual void protocols::loops::LoopRelaxMover::apply(core::pose::Pose&)':
src/protocols/loops/LoopRelaxMover.cc:568: error: 'build_threading_model' is not a member of 'core::options::OptionKeys::loops'
scons: *** [build/src/release/linux/2.6/64/x86/gcc/protocols/loops/LoopRelaxMover.os] Error 1
scons: building terminated because of errors.