DRIVERS-2328 : The legacy shell will no longer be installed in the near future. Drivers are encouraged to remove all usages of the legacy shell in their drivers with this Go driver PR serving as inspiration. All drivers that require the use of the legacy library are required to define the INSTALL_LEGACY_SHELL environment variable to a non-zero value when running MongoDB installation (either by running run-orchestration.sh or by manually invoking download_and_extract() from download-mongoldb.sh ). This variable replaces the current SKIP_LEGACY_SHELL variable which will no longer be respected. The upcoming changes can be tested by using the development branch for this change. In your evergreen functions, locate the git clone command that clones the drivers-evergreen-tools repository and replace it with this command: git clone https: //github.com/alcaeus/drivers-evergreen-tools.git --depth 1 --branch skip-legacy-shell-by- default $DRIVERS_TOOLS This will show which of your build tasks still need the legacy shell, which can be installed using the INSTALL_LEGACY_SHELL environment variable in that specific task.