I think this is more versatile than flashcards and flacards.
Created attachment 93697 [details]
Created attachment 93698 [details]
tbz2 (no real release tarball available)
Sorry for the URL mess ;-)
CTAN has zip's of directories like macros/latex/contrib/ticket, so you don't <em>necessarily</em> need a separate tar.
That said, it is of course the case that any updates will invalidate the digests....
<CTAN>/macros/latex/contrib/ticket.zip works; cf:
et cetera for the other CTAN sites and (most of) the mirrors.
I have the same question/remark than in http://bugs.gentoo.org/show_bug.cgi?id=142883#c6: why do you block >=tetex-2.96?
About the mirror thing, it's a known problem that CTAN does not number their releases. Policy is to mirror them in gentoo with a properly named tarball and put a comment with the CTAN tarball URL in the ebuild.
Again, my mistake, copied over the block from another ebuild.