From 2525f405849ba3eda738c42de5fb45592af32f21 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sandro=20J=C3=A4ckel?= <sandro.jaeckel@gmail.com>
Date: Fri, 1 Jul 2022 01:31:01 +0200
Subject: [PATCH] hydra: forcefully enable ca-derivations

---
 hosts/hydra/hydra.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/hosts/hydra/hydra.nix b/hosts/hydra/hydra.nix
index b08ae188..8b528033 100644
--- a/hosts/hydra/hydra.nix
+++ b/hosts/hydra/hydra.nix
@@ -52,8 +52,10 @@
   };
 
   nix = {
-    extraOptions = ''
+    extraOptions = lib.mkForce ''
       allowed-uris = http:// https:// ssh://
+      builders-use-substitutes = true
+      experimental-features = ca-derivations nix-command flakes
     '';
     trustedUsers = [ "hydra" "root" ];
     buildMachines = [{