specifying custom location for ecl-quicklisp packages

Dear all, we have trouble understanding how ecl-quicklisp can be configured to install packages at a custom location. Currently, either

(require :asdf) (asdf:load-system :ecl-quicklisp)

or

(require :ecl-quicklisp)

starts installing things into ~/quicklisp/

no matter what one tries. E.g. quicklisp FAQ tells about (quicklisp-quickstart:install :path ".quicklisp/") but this seems to need to be evaluated much earlier than (require :ecl-quicklisp)...

Does this mean one needs to change the ECL installation procedure to take care of this?

Thanks Dima