Trying hydra

flake.nix

@@ -31,6 +31,9 @@
         (builtins.attrNames (builtins.readDir ./modules)));
 
       nixosConfigurations = builtins.mapAttrs (name: value: (mkMachine name value self.nixosModules)) (importConfig ./machines);
+       hydraJobs = (nixpkgs.lib.mapAttrs' (name: config:
+        nixpkgs.lib.nameValuePair "nixos-${name}"
+        config.config.system.build.toplevel) self.nixosConfigurations);
 
     };
 }

machines/newton.nix

@@ -14,7 +14,28 @@ in
     };
   };
 
+  services.hydra = {
+    enable = true;
+    hydraURL = "https://hydra.julienmalka.me"; # externally visible URL
+    notificationSender = "hydra@localhost"; # e-mail of hydra service
+    port = 9876; # Default
+    # a standalone hydra will require you to unset the buildMachinesFiles list to avoid using a nonexistant /etc/nix/machines
+    buildMachinesFiles = [ ];
+    # you will probably also want, otherwise *everything* will be built from scratch
+    useSubstitutes = true;
+  };
 
+
+  services.nginx = {
+    enable = true;
+    virtualHosts = {
+      "hydra.julienmalka.me" = {
+        forceSSL = true;
+        enableACME = true;
+        locations."/" = { proxyPass = "http://127.0.0.1:9876"; };
+      };
+    };
+  };
   boot.loader.grub.enable = true;
   boot.loader.grub.version = 2;
   boot.supportedFilesystems = [ "zfs" ];

modules/nix/default.nix

@@ -12,7 +12,7 @@ with lib;
     {
       nix = {
         autoOptimiseStore = true;
-        allowedUsers = [ "julien" ];
+        allowedUsers = [ "julien" "hydra" ];
         gc = {
           automatic = true;
           dates = "daily";