Revamp nix packaging

flake.nix

@@ -25,7 +25,9 @@
       };
 
       rust-bin = rust-overlay.lib.mkRustBin { } pkgs.buildPackages;
-      toolchain = rust-bin.stable.latest.default;
+      toolchain = rust-bin.stable.latest.default.override {
+        extensions = [ "rust-src" "rust-analyzer" "rust-std" ];
+      };
     in f system pkgs toolchain);
   in {
     apps = forAllSystems (system: pkgs: _: {
@@ -42,12 +44,6 @@
       default = pkgs.mkShell {
         nativeBuildInputs = [
           toolchain
-          pkgs.pkg-config
-        ];
-
-        buildInputs = [
-          # pkgs.systemdLibs.dev
-          pkgs.dbus.dev
         ];
 
         RUST_SRC_PATH = "${toolchain}/lib/rustlib/src/rust/library";