When I try to "darcs pull" an existing cl-variates checkout, I get this:
Waiting for lock
/home/quicklisp/quicklisp-controller/vcs-cache/cl-variates/8fdba34f923f1697c9fc5cfe92edcdac/_darcs/lock
Couldn't get lock
/home/quicklisp/quicklisp-controller/vcs-cache/cl-variates/8fdba34f923f1697c9fc5cfe92edcdac/_darcs/lock
What should I do?