ERROR: missing interface for module (gnutls) (was: 'python-build-system')

[Nikita Karetnikov]

>> # ./pre-inst-env guix download 
>> https://launchpad.net/bzr/2.5/2.5.1/+download/bzr-2.5.1.tar.gz
>>
>> [...]
>>
>> ERROR: missing interface for module (gnutls)

> That’s because GnuTLS is not available on your system.  You must install
> it if you want to be able to use ‘guix download’ with https.
> Fortunately, you just have to type ‘guix package -i gnutls’.  :-)

Sadly, it didn't help.  Should I somehow indicate that I want to use a
program from my profile?

I'm using './pre-inst-env'.  Can it be connected with the problem?

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