I don't think cb's builds have ever worked for me on Fedora. I upgraded it once after a long while and got this thing:
> cb list
error: SSL_CTX_new: error:030000A9:digital envelope routines::unknown option
id: eda3c86a40d54b328e791c057aebe05f
Which is vaguely familiar...I feel that I had this over a year ago, too. It doesn't happen if I build cb myself, which I guess is what I have been doing. (I just did it again)