I coincidentally found the very same issue recently. The issue appeared to be that the newest version of conda (4.6.x) was more specific in checking versions than the older release, such that sagemath-conway-polynomials 0.5.p0 (version 0.5, patchlevel 0) was thought to be a prerelease version and thus didn't satisfy a version check for '>=0.5.*'.
This is addressed in the github issue https://github.com/conda-forge/sage-feedstock/issues/30, and with any luck it is resolved now. -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
