diff --git a/deps.nix b/deps.nix
index 8796770f..ef9585b8 100644
--- a/deps.nix
+++ b/deps.nix
@@ -36,4 +36,5 @@ with pkgs;
   perlPackages.TextTable
   perlPackages.XMLSimple
   nixUnstable
+  guile                                  # optional, for Guile + Guix support
 ]