programs/mpv: Fix evaluation for installPhase

The package no longer[1] uses an installPhase but instead the same is
now in postInstall. Since that module is pretty old I didn't use a
fallback to an empty installPhase, so the evaluation fails now.

Using postInstall along with a proper fallback should fix this, although
I haven't tested whether $out/etc/mpv/mpv.conf is still recognised by
mpv nowadays, we'll see...

[1]: https://github.com/NixOS/nixpkgs/commit/542d7589568c2f3c6ac58c6e307

Signed-off-by: aszlig <aszlig@nix.build>

0 files changed, 0 insertions, 0 deletions