guix refresh to a specific version?

[Hartmut Goebel]

Hi,

I wonder whether this is a way to refresh to a specific version, like 
one can import a specific version:

works:

    guix import pypi trytond@6.2.0

does not work:

    guix refresh -u trytond@6.2.0
    […]
    guix refresh: error: trytond: package not found for version 6.2.0

My use-case is to update 170 trytond modules from 6.0.x to the 6.2.x, 
while 6.4 is current. (I have a list of exact versions, thus being able 
to specify a discrete version is fine.)

--
Regards
Hartmut Goebel

| Hartmut Goebel          | h.goebel@crazy-compilers.com               |
| www.crazy-compilers.com | compilers which you thought are impossible |