Thanks @soegaard2. It was considerably less elegant than yours, but I did: https://gist.github.com/dys-bigwig/a55f81bb9a26d0766ff7069371f83e9d

I always feel bad using the ..1 pattern because I never see it used anywhere else, but having to do (list :strings-ci s ss …) and then concatenate them (s and ss) back together to get the full list just to map over it doesn’t feel right.