I think he means that you need to add libass to the inputs of the vlc
package. look a few lines under where $ guix edit vlc; takes you. try
adding it there.

On 13.03.2018 03:01, Dang Duong wrote:
> My video.scm already has libass. I tried removing and reinstalling VLC
> but it doesn't work.
>  Am I missing something?
> 
> On Mon, Mar 12, 2018 at 5:14 PM, Ludovic Courtès <ludo@gnu.org
> <mailto:ludo@gnu.org>> wrote:
> 
>     Hello,
> 
>     Dang Duong <khanhduongdv@gmail.com <mailto:khanhduongdv@gmail.com>>
>     skribis:
> 
>     > I have installed the latest version of VLC (2.2.8) on Trisquel 7.0 using
>     > Guix. It works normally with .srt files but cannot open .ass files. I tried
>     > installing libass but it still doesn't work.
> 
>     It seems that our vlc package lacks libass as an input:
> 
>      
>     https://git.savannah.gnu.org/cgit/guix.git/tree/gnu/packages/video.scm#n810
>     <https://git.savannah.gnu.org/cgit/guix.git/tree/gnu/packages/video.scm#n810>
> 
>     Could you try adding libass in the vlc package definition, then install
>     it, and see if it works?
> 
>     If you’re not familiar with Guix packaging, see
>     <https://www.gnu.org/software/guix/manual/html_node/Defining-Packages.html
>     <https://www.gnu.org/software/guix/manual/html_node/Defining-Packages.html>>,
>     and do not hesitate to ask for guidance here or on #guix on IRC!
> 
>     HTH,
>     Ludo’.
> 
> 

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