diff --git a/pkgs/misc/tmux-plugins/default.nix b/pkgs/misc/tmux-plugins/default.nix
index 8cc8f8200cd5..a9bb41c56b00 100644
--- a/pkgs/misc/tmux-plugins/default.nix
+++ b/pkgs/misc/tmux-plugins/default.nix
@@ -16,7 +16,7 @@ let
       rtp = "${derivation}/${path}/${rtpFilePath}";
     }
     // {
-      overrideAttrs = f: mkTmuxPlugin (attrs // f attrs);
+      overrideAttrs = f: mkTmuxPlugin (attrs // (if lib.isFunction f then f attrs else f));
     };
 
   mkTmuxPlugin =