haskell: fix package sets based on integer-simple

Fixes mass build failures in these package sets,
due to "unknown pacakge: integer-simple".

Attributes that demonstrate this (see before/after):

* haskell.packages.integer-simple.ghc843.hello
* haskell.packages.integer-simple.ghc802.scientific

The second one is from the NixOS manual, FWIW.

1 files changed, 1 insertions, 0 deletions

diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 7836f71e2ea..cca0b7ba346 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -200,6 +200,7 @@ in rec {
         (pkgs.lib.attrNames packages);
     in pkgs.lib.genAttrs integerSimpleGhcNames (name: packages."${name}".override {
       ghc = bh.compiler.integer-simple."${name}";
+      buildHaskellPackages = bh.packages.integer-simple."${name}";
       overrides = _self : _super : {
         integer-simple = null;
         integer-gmp = null;