From 932e9666a1241c4b441368da0e8d80284b971e3c Mon Sep 17 00:00:00 2001
From: Drew Hess <dhess-src@hackworthltd.com>
Date: Sat, 2 Jan 2021 20:39:12 +0000
Subject: [PATCH] Work around a nix issue.

See https://github.com/NixOS/nix/pull/4264
---
 overlays/patches.nix | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/overlays/patches.nix b/overlays/patches.nix
index 06663e85..8913fc48 100644
--- a/overlays/patches.nix
+++ b/overlays/patches.nix
@@ -1,7 +1,22 @@
 self: super:
 let
+  # Work around nix issue; see:
+  # https://github.com/NixOS/nix/pull/4264
+  nixUnstable = super.nixUnstable.overrideAttrs (drv: {
+    patches = (drv.patches or [ ]) ++ [
+      # BoehmGCStackAllocator: disable GC with coroutines https://github.com/NixOS/nix/pull/4264
+      (super.fetchpatch {
+        url = "https://github.com/NixOS/nix/pull/4264.patch";
+        sha256 = "sha256-pEvymyZLidu1Zn5LpRXcfRXF/cNqglDLx2HIGrbwksE=";
+      })
+    ];
+  });
+  nixFlakes = nixUnstable;
+
 in
 {
+  inherit nixUnstable nixFlakes;
+
   # Hydra fixes from iohk and other various sources.
   hydra-unstable = super.hydra-unstable.overrideAttrs (
     drv: {