diff --git a/pkgs/development/haskell-modules/lib.nix b/pkgs/development/haskell-modules/lib.nix
index aebab7b6f040..58d50592ac42 100644
--- a/pkgs/development/haskell-modules/lib.nix
+++ b/pkgs/development/haskell-modules/lib.nix
@@ -86,6 +86,11 @@ rec {
      future.
 
      Instead of jailbreaking, you can patch the cabal file.
+     
+     Note that jailbreaking at this time, doesn't lift bounds on
+     conditional branches. 
+     https://github.com/peti/jailbreak-cabal/issues/7 has further details.
+     
    */
   doJailbreak = drv: overrideCabal drv (drv: { jailbreak = true; });