diff --git a/survey/default.nix b/survey/default.nix
index 70afbbc..28cb0e9 100644
--- a/survey/default.nix
+++ b/survey/default.nix
@@ -81,6 +81,7 @@ let
   # `.override` and the likes).
   isProperHaskellPackage = val:
     lib.isDerivation val && # must pass lib.isDerivation
+    val.pname != "ghc-bignum" &&
     val ? env; # must have an .env key
 
   # Function that tells us if a given Haskell package has an executable.