code: def _get_build_env(env):
      '''
      Get build environment overrides dictionary to use in build process
      '''
      env_override = ''
      if env is None:
          return env_override
      if not isinstance(env, dict):
          raise SaltInvocationError(
              '\'env\' must be a Python dictionary'
          )
      for key, value in env.items():
          env_override += '{0}={1}\n'.format(key, value)
          env_override += 'export {0}\n'.format(key)
      return env_overridf _get_build_env(env):
      '''
      Get build environment overrides dictionary to use in build process
      '''
      env_override = ''
      if env is None:
          return env_override
      if not isinstance(env, dict):
          raise SaltInvocationError(
              '\'env\' must be a Python dictionary'
          )
      for key, value in env.items():
          env_override += '{0}={1}\n'.format(key, value)
          env_override += 'export {0}\n'.format(key)
      return env_override
docs: Get build environment overrides dictionary to use in build process