Installing generates missing dependency error

[matrei]

Gradle complains with the following error:

Could not resolve all files for configuration ':runtimeClasspath'.
Could not find com.amazon.alexa:alexa-skills-kit-java:1.1.6_SNAPSHOT.
Searched in the following locations:
- https://repo.maven.apache.org/maven2/com/amazon/alexa/alexa-skills-kit-java/1.1.6_SNAPSHOT/alexa-skills-kit-java-1.1.6_SNAPSHOT.pom
- https://repo.grails.org/grails/core/com/amazon/alexa/alexa-skills-kit-java/1.1.6_SNAPSHOT/alexa-skills-kit-java-1.1.6_SNAPSHOT.pom
Required by:
project : > org.grails.plugins:alexa-skills:0.1.2