On Sun, Jul 11 2021, zimoun wrote:

> Hi,
>
> On Sat, 10 Jul 2021 at 17:55, Xinglu Chen <public@yoctocell.xyz> wrote:
>
>>> Using the same commit you were using last,
>>> 652a03888e1609bd1a687326760436867fe2abb7, I can obtain the same Emacs
>>> (same store hash):
>>>
>>> $ guix time-machine --commit=652a03888e1609bd1a687326760436867fe2abb7 -- environment --ad-hoc emacs
>>> [env]$ which emacs
>>> /gnu/store/gbzd8hc6360vaxmk2xh5bzkx7dkkwl8q-profile/bin/emacs
>
> I get the same thing.
>
>>> Have you tried it in a container, like so:
>>>
>>> $ guix time-machine --commit=652a03888e1609bd1a687326760436867fe2abb7 \
>>>   -- environment -C --ad-hoc emacs -- emacs --version
>
> It works for me.
>
>> Hmm, the commands fails with
>>
>> --8<---------------cut here---------------start------------->8---
>> [...]
>> building package cache...
>> -builder for `/gnu/store/k4ih7z9q04nghfvw4by007z8ijskghkn-guix-package-cache.drv' failed to produce output path `/gnu/store/n6qbwd1ahj3b4jzgp0np3fhvw9msgz06-guix-package-cache'
>> build of /gnu/store/k4ih7z9q04nghfvw4by007z8ijskghkn-guix-package-cache.drv failed
>> View build log at '/var/log/guix/drvs/k4/ih7z9q04nghfvw4by007z8ijskghkn-guix-package-cache.drv.bz2'.
>> cannot build derivation `/gnu/store/cfsrsvrz5c3mrxkm0ddlq9hy2bbvbl5c-profile.drv': 1 dependencies couldn't be built
>> guix time-machine: error: build of `/gnu/store/cfsrsvrz5c3mrxkm0ddlq9hy2bbvbl5c-profile.drv' failed
>> --8<---------------cut here---------------end--------------->8---
>
> Hum, weird because I get this:
>
> /gnu/store/rr2cnfygjh2bkv7cysva5i8h0nil6gla-guix-package-cache.drv
>
> and you get:
> /gnu/store/k4ih7z9q04nghfvw4by007z8ijskghkn-guix-package-cache.drv.
>
> Do you have a custom channel file?  Usually, this kind of error come
> from a conflict between the packages from upstream (commit 652a03888)
> and local packages.

Yes, I do have a custom channel file

--8<---------------cut here---------------start------------->8---
$ guix describe
Generation 57	Jul 03 2021 11:44:49	(current)
  flat 7b8353e
    repository URL: https://github.com/flatwhatson/guix-channel
    branch: master
    commit: 7b8353ebbcf486e3344924d1cac0fa7ba47c371d
  raingloom 7f5bf6d
    repository URL: https://git.sr.ht/~raingloom/guix-packages
    branch: master
    commit: 7f5bf6d7783015c7899a6560f8bedc69b0d76393
  guix-science 0bd456d
    repository URL: https://github.com/guix-science/guix-science.git
    branch: master
    commit: 0bd456d2b0b25970e709ee408f1e1bc3f75b98ae
  guix eef099a
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: eef099a2e1648032c571567c6da29ccd86e72058
--8<---------------cut here---------------end--------------->8---

I also have a few Emacs-related local packages, but they won’t be found in
$GUILE_LOAD_PATH; I have to explicitly use the ‘--load=’ option when
using Guix Home.