pythonPackages.mutagen: move to a separate file

pkgs/development/python-modules/mutagen/default.nix

@@ -0,0 +1,28 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pytest
+, pkgs
+}:
+
+buildPythonPackage rec {
+  pname = "mutagen";
+  version = "1.36";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1kabb9b81hgvpd3wcznww549vss12b1xlvpnxg1r6n4c7gikgvnp";
+  };
+
+  checkInputs = [
+    pkgs.faad2 pkgs.flac pkgs.vorbis-tools pkgs.liboggz
+    pkgs.glibcLocales pytest
+  ];
+  LC_ALL = "en_US.UTF-8";
+
+  meta = with lib; {
+    description = "Python multimedia tagging library";
+    homepage = https://mutagen.readthedocs.io/;
+    license = licenses.lgpl2;
+  };
+}

pkgs/top-level/python-packages.nix

@@ -8136,26 +8136,7 @@ in {
     };
   };
 
-  mutagen = buildPythonPackage (rec {
+  mutagen = callPackage ../development/python-modules/mutagen { };
-    name = "mutagen-1.36";
-
-    src = pkgs.fetchurl {
-      url = "mirror://pypi/m/mutagen/${name}.tar.gz";
-      sha256 = "1kabb9b81hgvpd3wcznww549vss12b1xlvpnxg1r6n4c7gikgvnp";
-    };
-
-    # Needed for tests only
-    buildInputs = with self; [ pkgs.faad2 pkgs.flac pkgs.vorbis-tools pkgs.liboggz
-      pkgs.glibcLocales pytest
-    ];
-    LC_ALL = "en_US.UTF-8";
-
-    meta = {
-      description = "Python multimedia tagging library";
-      homepage = http://code.google.com/p/mutagen;
-      license = licenses.lgpl2;
-    };
-  });
 
 
   muttils = buildPythonPackage (rec {