Sbt project attempts to run "play update"

Why is my build trying to run “play”?

play update
bash: line 1: play: command not found

play update returned exit code 127

Action failed: play update

Here’s my circle.yml:

machine:
  environment:
    SBT_VERSION: 0.13.12
  services:
    - rabbitmq-server
    - mysql
    - redis
  java:
    version: openjdk8

dependencies:
  pre:
    - sbt about
  cache_directories:
    - "~/.ivy2"
    - "~/.sbt"

test:
  override:
    - sbt test

And the output from sbt about:

[info] This is sbt 0.13.12
[info] The current project is {file:/my-project/}root 1.0-SNAPSHOT
[info] The current project is built against Scala 2.11.8
[info] Available Plugins: *long list...*
[info] sbt, sbt plugins, and build definitions are using Scala 2.10.6

I think I’ve got it.

I added:

override:
    - sbt update

to the dependencies block. Now play update doesn’t run.

With that added, for me it runs “play test” instead of “sbt test”.