git submodule update --init
./rbm/rbm build release --step update_responses_config --target nightly --target torbrowser
Error: Template Error:
undef error - Undefined subroutine &RBM::DefaultConfig::capture_exec called at rbm/lib/RBM/DefaultConfig.pm line 108.

make: *** [Makefile:208: torbrowser-incrementals-nightly] Error 1