[plt-scheme] plt-web-server-text requires mred?

I built the nightly snapshot of mzscheme without mred and tried running 
plt-web-server-text and got this error:

;; --
modwest$ ./plt-web-server-text -h
standard-module-name-resolver: collection not found: "mred" in any of: 
(#<path:/.plt-scheme/352.6/collects> #<path:/plt-352.6/collects>)

  === context ===
cloop
;; --

Did I somehow do the build wrong?

Thanks,
Dave