diff --git a/shell.nix b/shell.nix
index 501ae7b..4f35b64 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,5 +1,6 @@
 attrs@{...}:
 let defaultAttrs = {
+  # Defaults are put in this form deliberately. Details: #748
   withHoogle = true;
   compiler = "ghc8101";
 };