diff --git a/packages.nix b/packages.nix
index df3b9cee..ccb78d69 100644
--- a/packages.nix
+++ b/packages.nix
@@ -11,5 +11,5 @@ let
 in with pkgs;
   [
     gems libxml2 nodejs yarn cacert git glibcLocales
-    pandoc (texlive.combine { inherit (texlive) scheme-basic xetex unicode-math enumitem booktabs ulem; })
+    pandoc (texlive.combine { inherit (texlive) scheme-basic xetex unicode-math enumitem booktabs ulem etoolbox; })
   ] ++ (if stdenv.isDarwin then [terminal-notifier] else [chromium])