Gradle master does not build

I’m not sure if I’m making some mistake, but I can’t seem to build gradle from master right now due to a change in

Here’s the output of ./gradlew build -s -i:
./gradlew --version:

Gradle 3.5-20170201174602+0000

Build time:   2017-02-01 17:46:02 UTC
Revision:     ae149e78eb032891fbc5ee545c9c953b9e0ac5cc

Groovy:       2.4.7
Ant:          Apache Ant(TM) version 1.9.6 compiled on June 29 2015
JVM:          1.8.0_112 (Oracle Corporation 25.112-b16)
OS:           Mac OS X 10.12.4 x86_64

Is my environment wrong or has master really been broken for 17 days?