Conditional sbt Settings

build.sbt

scalaVersion := "2.11.7"
crossScalaVersions := Seq("2.9.2", "2.10.5", "2.11.7")

publishTo := Some(Resolver.file("Unused transient repository", file("target/unusedrepo")))

def conditionalSettings[P](conditionalKey: SettingKey[P])(predicate: P => Boolean): Seq[Def.Setting[_]] = {
  // How can I make this suck less?
  Seq(
    publishArtifact := { if(predicate(conditionalKey.value)) false else publishArtifact.value },
    publishLocal := { if(predicate(conditionalKey.value)) {} else publishLocal.value },
    publish := { if(predicate(conditionalKey.value)) {} else publish.value },
    publishTo := { if(predicate(conditionalKey.value)) None else publishTo.value }
  )
}

conditionalSettings(scalaBinaryVersion)(_ == "2.10")

@jastice it won't compile

/path/build.sbt:371: error: `value` can only be used within a task or setting macro, such as :=, +=, ++=, Def.task, or Def.setting.