The Jenkins job dsl plugin is failing to let me send in boolean values to some of the types permitted.

For instance, with a job DSL plugin as follows:
job ( type: Maven ) {
snapshotDependencies(true)
}

Comes back with an error as follows:
Building in workspace /var/lib/jenkins/jobs/ii-product-branch-dsl-job/workspace
FATAL: No signature of method: script14031065985881688050943.Boolean() is applicable for argument types: (java.lang.String) values: [false]
Possible solutions: asBoolean(), collect(), collect(groovy.lang.Closure)
groovy.lang.MissingMethodException: No signature of method: script14031065985881688050943.Boolean() is applicable for argument types: (java.lang.String) values: [false]
Possible solutions: asBoolean(), collect(), collect(groovy.lang.Closure)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:55)
at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.callCurrent(PogoMetaClassSite.java:78)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:46)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:133)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:141)
at script14031065985881688050943.run(script14031065985881688050943.groovy:20)
at javaposse.jobdsl.dsl.DslScriptLoader.runDslEngineForParent(DslScriptLoader.java:69)
at javaposse.jobdsl.dsl.DslScriptLoader.runDslEngine(DslScriptLoader.java:93)
at javaposse.jobdsl.plugin.ExecuteDslScripts.perform(ExecuteDslScripts.java:159)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:772)
at hudson.model.Build$BuildExecution.build(Build.java:199)
at hudson.model.Build$BuildExecution.doRun(Build.java:160)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:535)
at hudson.model.Run.execute(Run.java:1732)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:234)

The Wiki reference shows the usage as:
snapshotDependencies(boolean checkSnapshotDependencies)

I have tried many variations to send in boolean values, such as casting asBoolean() and importing static java.lang.Boolean.TRUE as a type etc.

Either I am missing something, or there is a bug with this.