From 43ad14cad172eebfa38f6de7604187d583b8da86 Mon Sep 17 00:00:00 2001
From: Craige McWhirter <craige.mcwhirter@iohk.io>
Date: Wed, 21 Oct 2020 15:11:08 +1000
Subject: [PATCH] Additional caches

---
 roles/iohk.nix | 27 ++++++++++++++-------------
 1 file changed, 14 insertions(+), 13 deletions(-)

diff --git a/roles/iohk.nix b/roles/iohk.nix
index 0114687..e1f0d67 100644
--- a/roles/iohk.nix
+++ b/roles/iohk.nix
@@ -5,24 +5,25 @@
 {
 
   nix = {
+    package = pkgs.nixFlakes;
+    binaryCaches = [
+      "https://cache.nixos.org"
+      "https://hydra.iohk.io"
+      "https://iohk.cachix.org"
+      "https://mantis-ops.cachix.org"
+    ];
+    binaryCachePublicKeys = [
+      "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
+      "hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ="
+      "iohk.cachix.org-1:DpRUyj7h7V830dp/i6Nti+NEO2/nhblbov/8MW7Rqoo="
+      "mantis-ops.cachix.org-1:SornDcX8/9rFrpTjU+mAAb26sF8mUpnxgXNjmKGcglQ="
+    ];
     extraOptions = ''
       #repeat = 1   # Ensure reproducibility of builds
+      experimental-features = nix-command flakes ca-references
     '';
   };
 
-  nix.binaryCaches = [
-    "https://cache.nixos.org"
-    "https://hydra.iohk.io"
-    "https://iohk.cachix.org"
-    "https://mantis-ops.cachix.org"
-  ];
-  nix.binaryCachePublicKeys = [
-    "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
-    "hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ="
-    "iohk.cachix.org-1:DpRUyj7h7V830dp/i6Nti+NEO2/nhblbov/8MW7Rqoo="
-    "mantis-ops.cachix.org-1:SornDcX8/9rFrpTjU+mAAb26sF8mUpnxgXNjmKGcglQ="
-  ];
-
   # Set the system-wide environment
   environment = {
     systemPackages = with pkgs; [