if you try to build Gradle from sources, and follow the http://gradle.org/build.html or run build.gradle with default tasks you will get:

./gradlew clean dists

FAILURE: Could not determine which tasks to execute.

• What went wrong:
  Task 'dists' not found in root project 'gradle'.

• Try:
  Run with -t to get a list of available tasks.

BUILD FAILED

Seems, like the names of tasks changed, but it was not reflected neither in default tasks of build.gradle nor on the website.

See this discussion for more info http://www.nabble.com/build-from-sources---latest-snapshot---dists-or-distLibs---td25999529.html