Fix appveyor script
Fix appveyor script

dra27/jbuilder,janestreet/jbuilder,janestreet/jbuilder,janestreet/jbuilder,dra27/jbuilder,dra27/jbuilder,janestreet/jbuilder,dra27/jbuilder,rdavison/jbuilder,janestreet/jbuilder,dra27/jbuilder,rdavison/jbuilder,dra27/jbuilder,janestreet/jbuilder