Zelphir,

Zelphir Kaltstahl 写道：
> $ guix import pypi 'jupyterlab@2.1.5' --recursive

It will work if you substitute ‘/’ for ‘@’.  Yes, this is a happy 
accident specific to the PyPI importer, and I'm sure you can guess 
why it happens to work.

>> guix import hackage mtl@2.1.3.1
>
> But that is in the "hackage" import section. Is the same not 
> available
> for PyPI?

[...]

> Do the various importers work differently?

Unfortunately so.  It would be great(TM) if PACKAGE[@VERSION] were 
standard.  Each importer could handle it properly (e.g., by 
turning it into "/") or return a friendlier ‘the foo importer does 
not yet support versions’ error.

I don't have the time, but this sounds like a good 
intermediate-level hack for someone who does :-)

Kind regards,

T G-R