Why can't SBT find the Play 2.1 plugin?
playframework-2.1, sbt
Solution
The problem was including the scalaVersion setting inside the plugins.sbt file. This causes sbt to search for sbt-plugin_2.10.0_0.12 in the repositories when it should actually search for sbt-plugin_2.9.2_0.12.
I'm not sure about the semantics behind specifying the scalaVersion in the plugins.sbt file, but maybe it's declaring the Scala version that SBT is running on.
Here is a link to the Play 2.1 sbt-plugin files: http://repo.typesafe.com/typesafe/simple/ivy-releases/play/sbt-plugin/scala_2.9.2/sbt_0.12/2.1-RC1/srcs/
Problem
In my `plugins.sbt` file, I have ``` scalaVersion := "2.10.0" resolvers += "Typesafe repository" at "http://repo.typesafe.com/typesafe/releases/" addSbtPlugin("play" % "sbt-plugin" % "2.1") ``` When I try run `sbt` I get, among other things ``` [warn] ==== Typesafe repository: tried [warn] http://repo.typesafe.com/typesafe/releases/play/sbt-plugin_2.10_0.12/2.1/sbt- plugin-2.1.pom [warn] ==== public: tried [warn] http://repo1.maven.org/maven2/play/sbt-plugin_2.10_0.12/2.1/sbt-plugin-2.1.pom [warn] :::::::::::::::::::::::::::::::::::::::::::::: [warn] :: UNRESOLVED DEPENDENCIES :: [warn] :::::::::::::::::::::::::::::::::::::::::::::: [warn] :: play#sbt-plugin;2.1: not found [warn] :::::::::::::::::::::::::::::::::::::::::::::: [warn] [warn] Note: Some unresolved dependencies have extra attributes. Check that these dependencies exist with the requested attributes. [warn] play:sbt-plugin:2.1 (sbtVersion=0.12, scalaVersion=2.10) [warn] sbt.ResolveException: unresolved dependency: play#sbt-plugin;2.1: not found ``` Why can't SBT find the plugin? I've also tried `addSbtPlugin("play" % "sbt-plugin" % "2.1-RC1")` with similar results.