Hi,

I believe there is an issue with 'lower-gexp'. Running the following
snippet to lower a G-Expression for "i686-linux" yields output that
references store paths built for x86_64. In this case, the Guile
interpreter used is an x86_64 binary.

#+BEGIN_SRC scheme
(define (display-exp exp)
  (mlet* %store-monad ((lowered (lower-gexp exp
                                            #:system "i686-linux"
                                            #:target "i686-linux"))
                       (to-build -> (cons (lowered-gexp-guile lowered)
                                          (lowered-gexp-inputs lowered)))
                       (_ (built-derivations to-build)))
    (return (format #t "~a~%" (lowered-gexp-sexp lowered)))))

(with-store store
  (run-with-store store
    (display-exp #~(primitive-load #$(switch-system-program %system)))))
#+END_SRC