scalafix: deprecate phases and use pname&version

pkgs/development/tools/scalafix/default.nix

@@ -17,21 +17,20 @@ let
   };
 in
 stdenv.mkDerivation {
-  name = "${baseName}-${version}";
+  pname = baseName;
+  inherit version;
 
   nativeBuildInputs = [ makeWrapper ];
   buildInputs = [ jdk deps ];
 
-  doCheck = true;
-
-  phases = [ "installPhase" "checkPhase" ];
+  dontUnpack = true;
 
   installPhase = ''
     makeWrapper ${jre}/bin/java $out/bin/${baseName} \
       --add-flags "-cp $CLASSPATH scalafix.cli.Cli"
   '';
 
-  checkPhase = ''
+  installCheckPhase = ''
     $out/bin/${baseName} --version | grep -q "${version}"
   '';