From 6a23c9ddbef2bf80f28d9d2cda778f429a50b3f1 Mon Sep 17 00:00:00 2001
From: John Ericson <git@JohnEricson.me>
Date: Wed, 25 Dec 2019 13:14:48 -0500
Subject: [PATCH] haskell generic-builder: Fix `--with-ghc` flag for GHCJS as
 cross

Otherwise it passes `--with-ghc=ghc`, and we do the wrong thing.
---
 pkgs/development/haskell-modules/generic-builder.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/haskell-modules/generic-builder.nix b/pkgs/development/haskell-modules/generic-builder.nix
index d6966d691363..e27769d9c766 100644
--- a/pkgs/development/haskell-modules/generic-builder.nix
+++ b/pkgs/development/haskell-modules/generic-builder.nix
@@ -131,7 +131,7 @@ let
                    '';
 
   crossCabalFlags = [
-    "--with-ghc=${ghc.targetPrefix}ghc"
+    "--with-ghc=${ghcCommand}"
     "--with-ghc-pkg=${ghc.targetPrefix}ghc-pkg"
   ] ++ optionals stdenv.hasCC [
     "--with-gcc=${stdenv.cc.targetPrefix}cc"