On Mon, Nov 12, 2018 at 03:07:07AM +0800, Alex Vong wrote:
>      (source (origin
>                (method url-fetch)
> -              (uri (string-append "http://github.com/downloads/matricks/"
> -                                  "bam/bam-" version ".tar.bz2"))
> +              (uri (string-append "https://github.com/matricks/bam"
> +                                  "/archive/v" version ".tar.gz"))

We should consider fetching the source with Git — these auto-generated
GitHub snapshot tarballs may change in the future.