I'm not sure what plain
go get -v -d gets you but you should specify the package(s) that you want to install.
So what you should do is something like this:
$go get github.com/moul/http2curl
-d flag this should download and install the package
http2curl for you. But if you use the
-d flag, you can install the package by first moving to the package's directory.
And then running build (without *.go).