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-rw-r--r--system/services/nix/default.nix12
1 files changed, 6 insertions, 6 deletions
diff --git a/system/services/nix/default.nix b/system/services/nix/default.nix
index 28fc251f..946ba56c 100644
--- a/system/services/nix/default.nix
+++ b/system/services/nix/default.nix
@@ -8,10 +8,7 @@
   ...
 }: {
   nix = {
-    # Flakes settings
-    package = pkgs.nixVersions.stable;
-    # this can't be in nix settings because of some "type error". See:
-    # https://discourse.nixos.org/t/flakes-error-error-attribute-outpath-missing/18044
+    package = pkgs.nixUnstable;
 
     registry = {
       nixpkgs.flake = nixpkgs;
@@ -26,8 +23,11 @@
     };
     settings = {
       auto-optimise-store = true;
-      experimental-features = ["nix-command" "flakes"];
-      fallback = true;
+      experimental-features = ["nix-command" "flakes" "ca-derivations"];
+
+      substituters = "https://cache.ngi0.nixos.org/";
+      trusted-public-keys = "cache.ngi0.nixos.org-1:KqH5CBLNSyX184S9BKZJo1LxrxJ9ltnY2uAs5c/f1MA=";
+      fallback = true; # TODO what does this do?
 
       keep-failed = true; #keep failed tmp build dirs
       pure-eval = true; # restrict file system and network access to  hash