configuration/common/default.nix

@@ -30,8 +30,6 @@
     auto-optimise-store = true;
     # Keep buildtime dependencies
     keep-outputs = true;
-    # Build local, when caches are broken
-    fallback = true;
   };
 
   environment.systemPackages = with pkgs; [

hosts/hydra-1/configuration.nix

@@ -77,10 +77,15 @@
     '';
   };
 
-  services.harmonia = {
+  services.nix-serve = {
     enable = true;
-    settings.bind = "[::1]:5005";
+    port = 5005;
-    signKeyPath = config.age.secrets.nix-cache-key.path;
+    bindAddress = "127.0.0.1";
+    secretKeyFile = config.age.secrets.nix-cache-key.path;
+    # Workaround https://github.com/NixOS/nix/issues/7704#issuecomment-1409480909
+    package = pkgs.nix-serve-ng.override {
+      nix = pkgs.nixVersions.nix_2_12;
+    };
   };
 
   services.nginx.enable = true;
@@ -104,13 +109,7 @@
         '';
       };
       locations."/" = {
-        proxyPass = "http://[::1]:5005";
+        proxyPass = "http://127.0.0.1:5005";
-        extraConfig = ''
-          proxy_redirect http:// https://;
-          proxy_http_version 1.1;
-          proxy_set_header Upgrade $http_upgrade;
-          proxy_set_header Connection $connection_upgrade;
-        '';
       };
     };
   };