Enable custom sys-devices system feature

m/common/base.nix

@@ -11,6 +11,7 @@
     ./base/hw.nix
     ./base/net.nix
     ./base/nix.nix
+    ./base/sys-devices.nix
     ./base/ntp.nix
     ./base/rev.nix
     ./base/ssh.nix

m/common/base/sys-devices.nix

@@ -0,0 +1,9 @@
+{
+  nix.settings.system-features = [ "sys-devices" ];
+
+  programs.nix-required-mounts.enable = true;
+  programs.nix-required-mounts.allowedPatterns.sys-devices.paths = [
+    "/sys/devices/system/cpu"
+    "/sys/devices/system/node"
+  ];
+}

m/hut/configuration.nix

@@ -17,7 +17,6 @@
     ./postgresql.nix
     ./nginx.nix
     ./p.nix
-    ./hydra.nix
     #./pxe.nix
   ];
 

m/hut/hydra.nix

@@ -1,15 +0,0 @@
-{ ... }:
-{
-  services.hydra = {
-    enable = true;
-    hydraURL = "http://jungle.bsc.es/hydra"; # externally visible URL
-    notificationSender = "hydra@jungle.bsc.es"; # e-mail of Hydra service
-    port = 3001;
-    # 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;
-
-    listenHost = "0.0.0.0"; # Force IPv4
-  };
-}

m/hut/nginx.nix

@@ -48,17 +48,6 @@ in
           proxy_pass http://127.0.0.1:5000;
           proxy_redirect http:// $scheme://;
         }
-        location /hydra {
-          rewrite ^/hydra/(.*) /$1 break;
-          proxy_pass http://127.0.0.1:3001;
-          proxy_redirect http:// $scheme://;
-
-          proxy_set_header  Host              $host;
-          proxy_set_header  X-Real-IP         $remote_addr;
-          proxy_set_header  X-Forwarded-For   $proxy_add_x_forwarded_for;
-          proxy_set_header  X-Forwarded-Proto $scheme;
-          proxy_set_header  X-Request-Base    /hydra;
-        }
         location /lists {
           proxy_pass http://127.0.0.1:8081;
           proxy_redirect http:// $scheme://;