It looks like packages depending specifically on cover-lib instead of cover are failing for older versions of Racket. See racket-collections as an example. It may be because cover specifies version exceptions on raco but cover-lib does not. See here for a more detailed explanation.
It looks like packages depending specifically on
cover-libinstead ofcoverare failing for older versions of Racket. See racket-collections as an example. It may be becausecoverspecifies version exceptions on raco butcover-libdoes not. See here for a more detailed explanation.