Error while building docker image

[kunalvjti]

$ docker build -t skydock .
Sending build context to Docker daemon 194.6 kB
Step 1 : FROM crosbymichael/golang
---> 4335074ec436
Step 2 : RUN go get -u github.com/crosbymichael/skydock
---> Running in eb2dbf29ba1d

cd .; git clone https://github.com/crosbymichael/log /go/src/github.com/crosbymichael/log

Cloning into '/go/src/github.com/crosbymichael/log'...
fatal: could not read Username for 'https://github.com': No such device or address
package github.com/crosbymichael/skydock
imports github.com/crosbymichael/log: exit status 128
The command '/bin/sh -c go get -u github.com/crosbymichael/skydock' returned a non-zero code: 1

Looks like its trying to clone crosbymichael/log repo which doesn't exist ?