A problem has come up with the way the repositories are configured which temporarily affects Quicklisp users. The gitlab server has been configured to give the multiple-systems, antik-multiple-systems. They work but are not documented. I had intended that the master branch still be the one that goes into QL, but the April release of QL is getting the new branches. Until that is fixed, I recommend QL users go to the previous versions by retrieving the March dist:
(ql-dist:install-dist "
http://beta.quicklisp.org/dist/quicklisp/2015-03-02/distinfo.txt" :prompt nil :replace t)
Sorry about this mixup.