docs: def get_build_container_dir(self, arch):
          '''Given the arch name, returns the directory where it will be
          built.
  
          This returns a different directory depending on what
          alternative or optional dependencies are being built.
          '''
          dir_name = self.get_dir_name()
          return join(self.ctx.build_dir, 'other_builds',
                      dir_name, '{}__ndk_target_{}'.format(arch, self.ctx.ndk_api))