More installation lossage

Configuring with --prefix=/some/where --exec-prefix=/some/where/BINARIES --datadir=/some/where results in an XEmacs that cannot find its own lisp directories. The installation directory looks like (after installation): $ cd /some/where $ ls -R BINARIES/ lib/ mule-packages＠ xemacs-21.0-b37/ infodock-packages＠ man/ packages＠ BINARIES: bin/ lib/ BINARIES/bin: b2m* gnuattach* install-sid* send-pr* ctags* gnuclient* pstogif* xemacs＠ etags* gnudoit* rcs-checkin* xemacs-21.0-b37* BINARIES/lib: xemacs＠ xemacs-21.0-b37/ BINARIES/lib/xemacs-21.0-b37: etc＠ i586-pc-linux/ info＠ lisp＠ BINARIES/lib/xemacs-21.0-b37/i586-pc-linux: DOC install-sid* tm-file* add-big-package.sh* make-docfile* tm-html* add-little-package.sh* make-path* tm-image* config.values mmencode* tm-mpeg* cvtmail* movemail* tm-plain* digest-doc* profile* tm-ps* fakemail* rcs2log* tmdecode* gnuserv* send-pr* vcdiff* gzip-el.sh* sorted-doc* wakeup* hexl* tm-au* yow* lib: xemacs/ lib/xemacs: lock/ lib/xemacs/lock: man: man1/ man/man1: ctags.1 gnuattach.1 gnudoit.1 xemacs.1 etags.1 gnuclient.1 gnuserv.1 xemacs-21.0-b37: etc/ info/ lisp/ xemacs-21.0-b37/etc: [...] xemacs-21.0-b37/info: [...] xemacs-21.0-b37/lisp: [...]