Can't compile under gradle: Could not find com.github.jengelman.gradle.plugins:shadow:1.2.1.

[EmergencyTemporalShift]

> Could not resolve all artifacts for configuration ':classpath'.
   > Could not find com.github.jengelman.gradle.plugins:shadow:1.2.1.
     Searched in the following locations:
       - https://jcenter.bintray.com/com/github/jengelman/gradle/plugins/shadow/1.2.1/shadow-1.2.1.pom
     Required by:
         project :

Possible solution:
 - Declare repository providing the artifact, see the documentation at https://docs.gradle.org/current/userguide/declaring_repositories.html

Stock project won't compile under gradle.