diff --git a/overlays/signal-desktop-bin/default.nix b/overlays/signal-desktop-bin/default.nix
new file mode 100644
index 0000000..be1b4c3
--- /dev/null
+++ b/overlays/signal-desktop-bin/default.nix
@@ -0,0 +1,10 @@
+{ ... }:
+(final: prev: {
+  signal-desktop-bin = prev.signal-desktop-bin.overrideAttrs (oldAttrs: {
+    nativeBuildInputs = oldAttrs.nativeBuildInputs ++ [ prev.makeWrapper ];
+    postInstall = oldAttrs.postInstall or "" + ''
+      wrapProgram $out/bin/signal-desktop \
+        --add-flags "--enable-features=UseOzonePlatform --ozone-platform=wayland"
+    '';
+  });
+})
diff --git a/systems/x86_64-linux/carbon/default.nix b/systems/x86_64-linux/carbon/default.nix
index 151a64e..45727d7 100644
--- a/systems/x86_64-linux/carbon/default.nix
+++ b/systems/x86_64-linux/carbon/default.nix
@@ -63,13 +63,7 @@
     hugo
     nixos-generators
     vlc
-    (signal-desktop-bin.overrideAttrs (oldAttrs: {
-      nativeBuildInputs = oldAttrs.nativeBuildInputs ++ [ pkgs.makeWrapper ];
-      postInstall = oldAttrs.postInstall or "" + ''
-        wrapProgram $out/bin/signal-desktop \
-          --add-flags "--enable-features=UseOzonePlatform --ozone-platform=wayland"
-      '';
-    }))
+    signal-desktop-bin
   ];
 
   programs.light.enable = true;