I installed tinydns on my mac. Now pkgsrc thinks that I have also 
installed daemontools but It hasn't because none of the binaries are 
present.

bmake deinstall says pkg_delete: package 'daemontools-0.70' doesn't 
have a prefix
pkg_delete daemontools-0.70 gives the same error message

bmake reinstall, update, and replace also all fail because it could not 
delete this package which apparently has no prefix.

How do I tell pkgsrc to delete this package so I can re-install it?