Hello, all, I am trying to make the next big thing with Yesod -- but for now, just a Hello World website. After getting it running locally, I tried to integrate it with Circle CI, which has support for cabal-based Haskell projects. Circle CI runs the following commands: cabal sandbox init cabal install --upgrade-dependencies --constraint="template-haskell installed" --dependencies-only --enable-tests With this invocation, cabal cannot resolve dependencies no matter how I change the cabal config. If, however, I run just `cabal install`, everything works. This cabal failure occurs both on a CircleCI host and my laptop exactly the same way, so I know it's not my environment. I wrote a StackOverflow question with more details: http://stackoverflow.com/questions/31010999/cabal-cannot-resolve-dependencie... The github repo, for ease of reproducing the problem: https://github.com/philipmw/yesod-website I hope that someone on the list is able to help. Thanks. -- Philip