diff --git a/overlays/default.nix b/overlays/default.nix
new file mode 100644
index 0000000..068142f
--- /dev/null
+++ b/overlays/default.nix
@@ -0,0 +1,8 @@
+{ inputs }:
+
+final: prev: {
+  picom = prev.picom.overrideAttrs (old: {
+    version = "unstable-2021-08-04";
+    src = inputs.picom;
+  });
+}