docker build does not work

[ghost]

ALITD031:conductor kgraham$ docker build . -t conductor:latest
Sending build context to Docker daemon 48.64 kB
Step 1/8 : FROM google/golang
 ---> 09ec5b5ecced
Step 2/8 : WORKDIR /gopath/src/app
 ---> Using cache
 ---> 3c2c8d5174da
Step 3/8 : ADD . /gopath/src/app/
 ---> Using cache
 ---> bf6149e95bb9
Step 4/8 : RUN go get github.com/Sirupsen/logrus
 ---> Using cache
 ---> 92c6fc7cb485
Step 5/8 : RUN go get github.com/hashicorp/consul/api
 ---> Running in c8bed2752e7b
package context: unrecognized import path "context"
The command '/bin/sh -c go get github.com/hashicorp/consul/api' returned a non-zero code: 1

[ghost]

more context

Step 5/8 : RUN go get -v github.com/hashicorp/consul/api
 ---> Running in 3f7a10d5ae0f
github.com/hashicorp/consul (download)
import "context": import path does not begin with hostname
package context: unrecognized import path "context"
github.com/hashicorp/go-cleanhttp (download)
github.com/hashicorp/go-rootcerts (download)
github.com/hashicorp/serf (download)