onetbb, tiledb: fix dylib install name on Darwin (#525497)

pkgs/by-name/on/onetbb/package.nix

@@ -77,6 +77,9 @@ stdenv.mkDerivation (finalAttrs: {
   cmakeFlags = [
     (lib.cmakeBool "TBB_DISABLE_HWLOC_AUTOMATIC_SEARCH" false)
     (lib.cmakeBool "TBB_TEST" finalAttrs.finalPackage.doCheck)
+  ]
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
+    (lib.cmakeFeature "CMAKE_INSTALL_NAME_DIR" "${placeholder "out"}/lib")
   ];
 
   env = {

pkgs/by-name/ti/tiledb/package.nix

@@ -124,10 +124,6 @@ stdenv.mkDerivation (finalAttrs: {
     "doc"
   ];
 
-  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
-    install_name_tool -add_rpath ${onetbb}/lib $out/lib/libtiledb.dylib
-  '';
-
   meta = {
     description = "Allows you to manage massive dense and sparse multi-dimensional array data";
     homepage = "https://github.com/TileDB-Inc/TileDB";