
2. The parent of a failed child process in build_environment.fork no longer calls sys.exit - instead it raises a CommandError (from [1]) 3. test-install command now attempts to install all packages even if one fails
2. The parent of a failed child process in build_environment.fork no longer calls sys.exit - instead it raises a CommandError (from [1]) 3. test-install command now attempts to install all packages even if one fails