Set GOPATH=C:\go_code in your environment.
GOPATH=C:\go_code
Move C:\go_code\src\hugo to C:\go_code\src\github.com\spf13\hugo.
C:\go_code\src\hugo
C:\go_code\src\github.com\spf13\hugo
See https://github.com/golang/go/wiki/GOPATH