From 45c3fa1817b02da63f28c98ae32aaa95dda3717d Mon Sep 17 00:00:00 2001
From: Sebastien Bourdeauducq <sb@m-labs.hk>
Date: Sun, 12 Sep 2021 17:12:16 +0800
Subject: [PATCH] apply Mozilla nixpkgs overlay

This is preparing for RISC-V firmware compilation.
---
 artiq-fast/default.nix         |  2 +-
 artiq-fast/mozilla-overlay.nix | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)
 create mode 100644 artiq-fast/mozilla-overlay.nix

diff --git a/artiq-fast/default.nix b/artiq-fast/default.nix
index 7316327..20f4033 100644
--- a/artiq-fast/default.nix
+++ b/artiq-fast/default.nix
@@ -1,4 +1,4 @@
-{ pkgs ? import <nixpkgs> {}}:
+{ pkgs ? import <nixpkgs> { overlays = [ (import ./mozilla-overlay.nix) ]; }}:
 with pkgs;
 let
   artiq6 = pkgs.lib.strings.versionAtLeast mainPackages.artiq.version "6.0";
diff --git a/artiq-fast/mozilla-overlay.nix b/artiq-fast/mozilla-overlay.nix
new file mode 100644
index 0000000..f294a7e
--- /dev/null
+++ b/artiq-fast/mozilla-overlay.nix
@@ -0,0 +1,10 @@
+let
+  pkgs = import <nixpkgs> {};
+  overlay = pkgs.fetchFromGitHub {
+    owner = "mozilla";
+    repo = "nixpkgs-mozilla";
+    rev = "0510159186dd2ef46e5464484fbdf119393afa58";
+    sha256 = "sha256-HJX4Pc5ZUAg4apxB/XHuJ+6ukzvRQqeZMjscOBst2bA=";
+  };
+in
+  import overlay