diff --git a/jsaddle-wkwebview/default.nix b/jsaddle-wkwebview/default.nix
index f1cf1e54..1db94ce1 100644
--- a/jsaddle-wkwebview/default.nix
+++ b/jsaddle-wkwebview/default.nix
@@ -7,8 +7,16 @@ mkDerivation {
   version = "0.9.4.0";
   src = ./.;
   libraryHaskellDepends = [ aeson base bytestring jsaddle data-default ];
-  libraryFrameworkDepends = with buildPackages; if hostPlatform.useiOSCross or false then [
-    (assert osx_sdk != null; osx_sdk)
+
+  # HACK(matthewbauer): Make sure framework is pulled in first so that
+  # CoreFoundation is correct. Eventually we will update
+  # CoreFoundation in Nixpkgs but that has caused some other issues.
+  preBuild = stdenv.lib.optionalString hostPlatform.useiOSPrebuilt ''
+    NIX_CFLAGS_COMPILE="-F${buildPackages.darwin.xcode_8_2}/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks"
+  '';
+
+  libraryFrameworkDepends = with buildPackages; if hostPlatform.useiOSPrebuilt then [
+    "${darwin.xcode_8_2}/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System"
   ] else [
     darwin.libobjc
     darwin.apple_sdk.libs.xpc