宋文武 <iyzs...@gmail.com> skribis:

>> Then run:
>>
>>    guix build -e '(@ (emacs-snapshot) webkitgtk-2.4/gtk+-3)'
>>
>>
>> error:
>>
>> #+BEGIN_COMMENT
>> guix build: error: failed to evaluate expression `(@ (emacs-snapshot) 
>> webkitgtk-2.4/gtk+-3)': (wrong-type-arg "module-variable" "Wrong type 
>> argument in position ~A (expecting ~A): ~S" (1 "module" #f) (#f))

I’ve improved the format of error reports now (this one looks
terrible!), but it’s trying to tell you that the ‘@’ form is misused.

The expected syntax is:

  (@ MODULE VARIABLE)

when MODULE is a valid module name, such as (gnu packages emacs), and
VARIABLE is a variable name.

Here there’s apparently no (emacs-snapshot) module.

HTH,
Ludo’.

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