jdk8 break maven-plugin-plugin?

i have created a maven plugin from the plugin archetype.

i have a mojo which apparently does not matter to repeating this process,
any mojo will do.

the project is in a reactor. the reactor runs the module but the plugin
does not use reactor pom as parent.

the compilation succeeds out of the archetype.

regardless of what code lives in execute(), the act of adding a jdk8 jar
dependency to this plugin's pom will cause the gisted failure.

the environment and reactor build version is jdk 1.8

the pom and output are at

https://gist.github.com/jnorthrup/83621d3f3c3a14433470