Julien Lepiller 写道：
> Try
>
> guix graph --path -t references `readlink -f 
> /run/current-system` php

Thanks!  I tried all ‘guix graph’ permutations I could think of, 
including that one, but:

  λ guix graph --path -t references `readlink -f 
  /run/current-system` bash
  guix graph: error: no path from '/gnu/store/cca…-system' to
  '/gnu/store/vk4…-bash-5.0.16-doc'

The guix command above is the same version of Guix that built 
current-system, and current-system's closure does contain that 
bash's :out.

I'm sure I simply don't understand exactly how ‘guix graph’ works. 
In fact I'm certain of it.  That's something I can fix.

Kind regards,

T G-R