Trouble building cockroachdb

I am trying to setup cockroachdb on my local for development, make build runs completely without error, but no cockroach executable is generated. Here is the build log.

according to my experience, maybe you should run again and again until cockroach executable is generated or some errors may appear.

You are building CockroachDB outside of the GOPATH tree. This is unsupported.

Do this:

$ mkdir -p $GOPATH/src/
$ cd $GOPATH/src/
$ git clone
$ cd cockroach
$ make build