Ludovic Courtès <ludo@gnu.org> writes:

> On closer inspection, I see two issues:
>
>   (define (packages->transitive-inputs packages)
>     "Return a list of the transitive inputs for all PACKAGES."
>     (define (transitive-inputs package)
>       (filter-map (match-lambda
>                    ((_ (? package? package)) package)
>                    (_ #f))    ; <---- !
>                   (bag-transitive-inputs
>                    (package->bag package))))
>     (delete-duplicates
>      (append-map transitive-inputs packages)))
>
> Here only inputs of the form ("foo" PKG) are considered; things like
> ("glib" ,glib "bin") are discarded.
>
>   (define (for-each-search-path proc inputs derivations pure?)
>     (let ((paths (map derivation->output-path derivations))) ; <-- !
>       [...]
>
> Above, ‘derivation->output-path’ considers only the “out” output,
> ignoring others if they are needed.

Here's a patch.  WDYT?