[zorp] Can't Open policy.boot

Under debian etch I can't seem to get zorp instances to start. I see the following in syslog: Error opening policy.boot file; file='${prefix}/share/zorp/policy.boot' That error is repeated for each instance I'm trying to start. I'm using the debian packaged version, and I don't know what ${prefix} is set to, but I'm thinking that it must be either "/usr" or empty. My system does have /usr/share/zorp/policy.boot, and that file is world- readable. I tried creating /share/zorp/policy.boot as a copy of the /usr/share/zorp version, but that didn't change anything. Has anyone got the debian package of zorp running under etch? How can I find out for sure what ${prefix} is, or how can I otherwise get more detailed info about this error?