No such property: vcs for

Continuing the discussion from gradlew idea failed, No such property: vcs for class: org.gradle.plugins.ide.idea.model.IdeaProject_Decorated Possible solutions: ipr:

I got this today, after checking out gradle git repo for a first time (trying to build docs):

> gradle
:buildSrc:clean
:buildSrc:compileJava UP-TO-DATE
:buildSrc:compileGroovy
:buildSrc:processResources
:buildSrc:classes
:buildSrc:jar
:buildSrc:assemble
:buildSrc:checkstyleMain
:buildSrc:compileTestJava UP-TO-DATE
:buildSrc:compileTestGroovy
:buildSrc:processTestResources
:buildSrc:testClasses
:buildSrc:checkstyleTest UP-TO-DATE
:buildSrc:codenarcMain
:buildSrc:codenarcTest
:buildSrc:test
:buildSrc:check
:buildSrc:build

FAILURE: Build failed with an exception.

* Where:
Script '/home/saper/sw/gradle/gradle/idea.gradle' line: 29

* What went wrong:
A problem occurred evaluating script.
> No such property: vcs for class: org.gradle.plugins.ide.idea.model.IdeaProject_Decorated
  Possible solutions: ipr

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 1 mins 19.317 secs

The reason for this failure was that I was using gradle 2.1 previously installed on my system;
I should have started ./gradlew script in the root directory instead.