Timeout failure

When I submit code changes for a build, CircleCI reports that the build was successful but it still fails the build because of a timeout issue.

What do you advise? Here’s the CircleCI output:

Building 91%
BUILD SUCCESSFUL

Total time: 4 mins 50.598 secs
Email:
command make build took more than 10 minutes since last output

What can I do about this last line?