Hi Chris,

On 4/10/24 9:22, Chris Keschnat wrote:
> Hello,
> when upgrading a profile containing both mpv and ffmpeg, I get this
> error:
>
> #+begin_src sh
>    guix package: error: profile contains conflicting entries for ffmpeg
>    guix package: error:   first entry: ffmpeg@7.0.2 /gnu/store/xrllv211xv66hcyg19l3p9cd21yi9506-ffmpeg-7.0.2
>    guix package: error:   second entry: ffmpeg@6.1.1 /gnu/store/0i6f7jaxs47yr0qk2l4dsm7ik0ag7w8d-ffmpeg-6.1.1
>    guix package: error:    ... propagated from mpv@0.38.0
>    hint: Try upgrading both `ffmpeg' and `mpv', or remove one of them from the profile.
> #+end_src
>
> This commit looks like it could be responsible, although I think I upgraded after 2024-09-07:
> https://git.savannah.gnu.org/cgit/guix.git/commit/?id=1ac27c7a66097cc5a3d445539bd45556a433e062
>
> I am unsure about what the hint wants to tell me, because "upgrading
> both" is exactly what I am trying to do.

The same happened to me in my recent profile upgrade. It was surprising 
to me as well because I thought that upgrading the whole profile 
using "guix package -m my-manifest.scm" would avoid these kinds of 
conflicts "entirely", as suggested in this related issue report, 
https://issues.guix.gnu.org/37940.

I'm not sure how useful the hint is. It has rarely worked for me to 
resolve any conflicts (https://issues.guix.gnu.org/42595#3). This case 
was no exception.

I ended up removing "ffmpeg" and "mpv" from my manifest to be able to 
upgrade the profile. After the profile was upgraded, I installed only 
"mpv" again.