title: How can I use GHCi with the new cabal 1.17 sandboxes?
body: <p>I've been trying out cabal head which has support for sandboxes similar to cabal-dev. However there's not yet support for a <code>cabal-dev ghci</code> equivalent and <a href="http://hackage.haskell.org/trac/hackage/wiki/SandboxedBuildsAndIsolatedEnvironments" rel="noreferrer">apparently no support planned</a> for the next release. </p>
  
  <p>Is there some incantation I can use to work around this and get something similar to <code>cabal-dev ghci</code>?</p>