mpg123: move to by-name/ (#542804)

pkgs/by-name/mp/mpg123/package.nix

@@ -11,7 +11,7 @@
   libpulseaudio,
   withCoreAudio ? stdenv.hostPlatform.isDarwin,
   withJack ? stdenv.hostPlatform.isUnix,
-  jack,
+  libjack2,
   withConplay ? !stdenv.hostPlatform.isWindows,
   perl,
   writeScript,
@@ -45,7 +45,7 @@ stdenv.mkDerivation (finalAttrs: {
     ++ lib.optionals withPulse [ libpulseaudio ]
     ++ lib.optionals withCoreAudio [
     ]
-    ++ lib.optionals withJack [ jack ]
+    ++ lib.optionals withJack [ libjack2 ]
   );
 
   configureFlags =

pkgs/top-level/all-packages.nix

@@ -9081,10 +9081,6 @@ with pkgs;
     mopidy-ytmusic
     ;
 
-  mpg123 = callPackage ../applications/audio/mpg123 {
-    jack = libjack2;
-  };
-
   libmpg123 = mpg123.override {
     libOnly = true;
     withConplay = false;