How to install an old package version?

[Hartmut Goebel]

Hi,

I'm curious about how to install an old package version with guix.

Example for what I mean:

In e.g Debian, the list of available packages is separate from apt-get (et al.). So I can query all available versions of a package and install the version I need:

 $ apt-cache madison nginx
     nginx | 1.9.10-1~bpo8+3 | http://debian.mirror.lrz.de/debian/ jessie-backports/ma
     nginx | 1.6.2-5+deb8u2 | http://security.debian.org/ jessie/updates/main amd64 Pa

Now in guix, the list of available packages is build into guix, there is no external cache. So how can I e.g. install python-2.7.10 after I installed guix 0.11.0, which only defines python-2.7.11?

--
Schönen Gruß
Hartmut Goebel
Dipl.-Informatiker (univ), CISSP, CSSLP, ISO 27001 Lead Implementer
Information Security Management, Security Governance, Secure Software Development

Goebel Consult, Landshut
http://www.goebel-consult.de

Blog: http://www.goebel-consult.de/blog/bewertung-pgp-verschlusselung-bei-web.de-und-gmx
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