The SSL on
pkgs.racket-lang.org looks like it's OK after all.
My issue is that I was pulling from the old git repo, and said repo
was in a non-working state that doesn't recognize said the SSL
certificate (in addition to not being the latest racket).
Maybe the old repository at git://
git.racket-lang.org/plt.git could
periodically pull from the github repo (say, every night, or at every
release), or else a commit be made that replaces the entire contents
by a single README file and/or shell script explaining how to use the
new repo instead (and first undo the fatal all-destroying commit).
Have the courage to take your own thoughts seriously, for they will shape you.
— Albert Einstein