schemaspy: nitpicks

pkgs/development/tools/database/schemaspy/default.nix

@@ -13,21 +13,19 @@ stdenv.mkDerivation rec {
 
   buildInputs = [
     jre
-    makeWrapper
   ];
 
-  buildPhase = "true";
+  nativeBuildInputs = [
+    makeWrapper
+  ];
 
   wrappedPath = lib.makeBinPath [
     graphviz
   ];
 
-  installPhase =
-    ''
-      mkdir -p "$out/share/java"
-      cp ${src} "$out/share/java/${name}.jar"
+  installPhase = ''
+    install -D ${src} "$out/share/java/${name}.jar"
 
-      mkdir -p $out/bin
     makeWrapper ${jre}/bin/java $out/bin/schemaspy \
       --add-flags "-jar $out/share/java/${name}.jar" \
       --prefix PATH : "$wrappedPath"