>>>>> On Thu, 10 Oct 2019, Mike Pagano wrote:

> +   GENPATCHES_URI+=" ${use_cond_start}$(echo https://dev.gentoo.org/~{mpagano,whissi}/dist/genpatches/${tarball})${use_cond_end}"

The ~ should be backslash-escaped or quoted, otherwise it will be
expanded if there's a user mpagano or whissi on the system. :-)