How to kill an heroku build that is in progress?

If you have a build going into production right now and need to stop it quickly:

heroku plugins:install heroku-builds
heroku builds:cancel -a YOUR_HEROKU_APP_NAME

The heroku-builds CLI plugin (heroku plugins:install heroku-builds) has a command which will stop a running build:

$ heroku builds:cancel -a your-app-name

All builds will time out too after a time that can go between 15 minutes to 1 hour.

To view all builds run the following in your terminal:

heroku builds -a YOUR_APP_NAME

To cancel a specific (pending) build:

heroku builds:cancel -a YOUR_APP_NAME HEROKU_BUILD_ID

Update (4th July 2020):

If you see the message Warning: builds is not a heroku command, run heroku plugins:install heroku-builds and try again.

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