gnome-tour: fix build

pkgs/desktops/gnome-3/core/gnome-tour/default.nix

@@ -1,4 +1,5 @@
 { lib
+, stdenv
 , rustPlatform
 , gettext
 , meson
@@ -15,9 +16,11 @@
 , gnome3
 , libhandy
 , librsvg
+, rustc
+, cargo
 }:
 
-rustPlatform.buildRustPackage rec {
+stdenv.mkDerivation rec {
   pname = "gnome-tour";
   version = "3.38.0";
 
@@ -30,6 +33,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [
     appstream-glib
+    cargo
     desktop-file-utils
     gettext
     glib # glib-compile-resources
@@ -37,6 +41,8 @@ rustPlatform.buildRustPackage rec {
     ninja
     pkg-config
     python3
+    rustPlatform.cargoSetupHook
+    rustc
     wrapGAppsHook
   ];
 
@@ -48,12 +54,6 @@ rustPlatform.buildRustPackage rec {
     librsvg
   ];
 
-  # Don't use buildRustPackage phases, only use it for rust deps setup
-  configurePhase = null;
-  buildPhase = null;
-  checkPhase = null;
-  installPhase = null;
-
   postPatch = ''
     chmod +x build-aux/meson_post_install.py
     patchShebangs build-aux/meson_post_install.py