Looking at the error it seems your go directory structure is incorrect. You need to clone the git repo in this directory:
Make sure your $GOPATH is set up correctly:
Before you compile the binary with the build script, you will need to install the dependencies using glide
curl https://glide.sh/get | sh.
Once you have set up glide, you can run
glide install to install the dependencies specified in the glide.yaml file. This will create a vendor directory which will be used to find the packages needed to compile the binary.
Once this is all set up, you can invoke the build script