diff --git a/pkgs/by-name/co/cosmic-panel/package.nix b/pkgs/by-name/co/cosmic-panel/package.nix
index d04d0e00206b..4d23173862f8 100644
--- a/pkgs/by-name/co/cosmic-panel/package.nix
+++ b/pkgs/by-name/co/cosmic-panel/package.nix
@@ -11,14 +11,14 @@
   wayland,
 }:
 
-rustPlatform.buildRustPackage {
+rustPlatform.buildRustPackage rec {
   pname = "cosmic-panel";
   version = "1.0.0-alpha.5.1";
 
   src = fetchFromGitHub {
     owner = "pop-os";
     repo = "cosmic-panel";
-    rev = "epoch-1.0.0-alpha.5.1";
+    tag = "epoch-${version}";
     hash = "sha256-nO7Y1SpwvfHhL0OSy7Ti+e8NPzfknW2SGs7IYoF1Jow=";
   };