Go dependencies not building

I’m not too familiar with Go, but I’ve been using the following to compile Stout (an S3/Cloudfront upload tool) for months without problems:

    - go get github.com/tools/godep
    - git clone git@github.com:EagerIO/Stout.git
    - cd Stout; godep go build -o ../stout src/*.go

Today, this started failing with these errors: http://ajoslin.co/15Oxj/4Uh2wycl

Did something change? Am I doing something wrong?

Thank you!