I do not know why it works, but for me it fixed it. I'm not sure it's the cleanest solution. I used strace and saw that for some reason some pulseaudio libraries where not loaded (but since the log is a mess, I'm not even sure of this).

Using LD_LIBRARY_PATH is a hack and should generally be discouraged. Couldn't you use patchelf and patch the rpath of the teams binary instead?

I think I may have found a solution that doesn’t involve changing LD_LIBRARY_PATH.

The *.node files in the package seem to be some kind of dynamic libraries loaded by Electron/Node and it seems that one of them (slimcore.node I suspect) is attempting to load pulseaudio dynamically. It seems that the RPATH from the main application binary is not taken into account when the module is attempting to dynamically load(?) pulseaudio.

Adding runtimeDependencies to the RPATH of the Node modules seems to fix the issue.

@elyhaka can you test removing the makeWrapper bits and adding these? At least for me it changes the client to “Skype” in pavucontrol, like you described.

  dontAutoPatchelf = true;

  # Include runtimeDependencies in the RPATH of the included Node modules
  # so that dynamic loading works. See: https://github.com/NixOS/nixpkgs/issues/85449
  postFixup = ''
    autoPatchelf "$out"

    runtime_rpath="${lib.makeLibraryPath runtimeDependencies}"

    for mod in $(find "$out/opt/teams" -name '*.node'); do
      mod_rpath="$(patchelf --print-rpath "$mod")"

      echo "Adding runtime dependencies to RPATH of Node module $mod"
      patchelf --set-rpath "$runtime_rpath:$mod_rpath" "$mod"
    done;
  '';

If fixes the issue indeed ! @liff : Do you want me to update my PR with this fix or you want to open another one ?

(EDIT: sorry for the miss click on "Close" while responding... 🙄)

Updating your PR should be fine, thanks.

Done !

Maybe this fix should be backported to 20.03 ?

Is there anything still blocking this PR ? :)

Result of nixpkgs-review pr 85451 1

Is a backport required?

I believe this issue also exists on 20.03, I'm not sure to be honest ? Is there an easy way to try without switching my whole system to 20.03 ?

Thank you for the command ! Without this commit I do reproduce the issue on the 20.03.

Backport:
[detached HEAD b4f2f29] teams: fixing pulseaudio access
Author: Elyhaka 57923898+Elyhaka@users.noreply.github.com
Date: Fri Apr 17 18:23:31 2020 +0200
1 file changed, 22 insertions(+)
Press Enter to continue