diff --git a/pkgs/development/haskell-modules/configuration-nix.nix b/pkgs/development/haskell-modules/configuration-nix.nix
index 3ef96ca41382..feebec7d2dc0 100644
--- a/pkgs/development/haskell-modules/configuration-nix.nix
+++ b/pkgs/development/haskell-modules/configuration-nix.nix
@@ -94,6 +94,7 @@ self: super: builtins.intersectAttrs super {
   # Won't find it's header files without help.
   sfml-audio = appendConfigureFlag super.sfml-audio "--extra-include-dirs=${pkgs.openal}/include/AL";
 
+  # cachix needs boost_context dur to Nix, until boost has multiple outputs this is the easiest
   cachix = addBuildTools (enableSeparateBinOutput super.cachix) [pkgs.boost];
 
   niv = enableSeparateBinOutput super.niv;