diff --git a/.envrc b/.envrc
index 3550a30f..086df9e7 100644
--- a/.envrc
+++ b/.envrc
@@ -1 +1,3 @@
 use flake
+
+watch_file pkgRio.nix
diff --git a/pkgRio.nix b/pkgRio.nix
index 8be06432..7c5b2b0a 100644
--- a/pkgRio.nix
+++ b/pkgRio.nix
@@ -29,6 +29,7 @@ let
       darwin.libobjc
       darwin.apple_sdk_11_0.frameworks.AppKit
       darwin.apple_sdk_11_0.frameworks.AVFoundation
+      darwin.apple_sdk_11_0.frameworks.MetalKit
       darwin.apple_sdk_11_0.frameworks.Vision
     ]
     else