Please answer these questions before submitting your issue. Thanks!

1. What version of Go are you using (go version)?
   go version devel +43d2a10 Wed May 4 16:50:22 2016 +0000 linux/ppc64le
2. What operating system and processor architecture are you using (go env)?
   Fails here but also other platforms, not just ppc64le (failed on amd64 too) with upstream go. Does not give error message with go1.6.2.
   go env
   GOARCH="ppc64le"
   GOBIN=""
   GOEXE=""
   GOHOSTARCH="ppc64le"
   GOHOSTOS="linux"
   GOOS="linux"
   GOPATH="/home/boger/docker.test:/home/boger/docker.test/src/github.com/docker/docker/vendor"
   GORACE=""
   GOROOT="/home/boger/golang/upstream/go"
   GOTOOLDIR="/home/boger/golang/upstream/go/pkg/tool/linux_ppc64le"
   CC="gcc"
   GOGCCFLAGS="-fPIC -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build142829163=/tmp/go-build -gno-record-gcc-switches"
   CXX="g++"
   CGO_ENABLED="1"
3. What did you do?
   If possible, provide a recipe for reproducing the error.
   A complete runnable program is good.
   A link on play.golang.org is best.
   This is a compile time error message when building Docker. It happens on upstream Docker, 1.10.3, and 1.11.1. I haven't tried others.
   You need the docker dependencies installed:
   libsqlite3-dev btrfs-tools libdevmapper-dev

Here are the steps I followed:
mkdir -p ~/docker.test/docker.test/src/github.com/docker
cd ~/docker.test/src/github.com/docker
git clone https://github.com/docker/docker.git
cd docker
(here you can switch to an older tag or just use what's here -- I used 1.10.3)
git checkout -b v1.10.3 v1.10.3
hack/make.sh dynbinary 2>&1 | tee build.log // You can use binary instead of dynbinary and it still fails

This error is generated during the build
....
//# github.com/aws/aws-sdk-go/service/cloudwatchlogs
vendor/src/github.com/aws/aws-sdk-go/service/cloudwatchlogs/service.go:7: method redeclared: aws.Config.WithSleepDelay
method(*aws.Config) func(func(time.Duration)) *aws.Config
method(*aws.Config) func(func(time.Duration)) *<T>

once complete, you can go to this directory and reproduce the error with this command:
cd vendor/src/github.com/aws/aws-sdk-go/service/cloudwatchlogs/
go build service.go
//# command-line-arguments
./service.go:7: method redeclared: aws.Config.WithSleepDelay
method(*aws.Config) func(func(time.Duration)) *aws.Config
method(*aws.Config) func(func(time.Duration)) *<T>

1. What did you expect to see?
   No error messages, as happens when built with go1.6
2. What did you see instead?
   The above error messages