I have the following lines in my build.sbt file.
resolvers += \"specs2 snapshot repo\" at \"http://scala-tools.org/repo-snapshots\"
libraryDepe
you should try :
libraryDependencies += "org.specs2" %% "specs2" % "1.7-SNAPSHOT" % "test" changing()
changing() will specify that the dependency can change and that it ivy must download it on each update.
Maybe you could also try to define your repository using ivyXML. Something like this :
ivyXML :=
<resolvers>
<ibiblio name="specs2 snapshot repo" changingPattern="*-SNAPSHOT" m2compatible="true" root="http://scala-tools.org/repo-snapshots"/>
</resolvers>
Hope this will help.