fix: avoid nix flake config interactive prompts in buildkite

Author: johnalotoski

nix/metal/bitteProfile/buildkite/buildkite-agent-containers.nix

@@ -429,6 +429,10 @@ in
         };
       };
 
+      # The buildkite host machine will need to be deployed twice before
+      # the /cache directory will be properly owned since the first deployment
+      # will have the activation run before the buildkite-agent-iohk user
+      # exists.
       system.activationScripts.cacheDir = {
         text = ''
           mkdir -p /cache

nix/metal/bitteProfile/buildkite/nix_nsswitch.nix

@@ -1,5 +1,11 @@
-{...}: {
+{lib, ...}: {
   nix = {
+    # To avoid build problems in containers
     sandboxPaths = ["/etc/nsswitch.conf" "/etc/protocols"];
+
+    # To avoid interactive prompts on flake nix config declarations
+    extraOptions = lib.mkForce ''
+      accept-flake-config = true
+    '';
   };
 }