diff --git a/hosts/op5p/configuration.nix b/hosts/op5p/configuration.nix
index 3b93a96..0cc22d5 100644
--- a/hosts/op5p/configuration.nix
+++ b/hosts/op5p/configuration.nix
@@ -39,5 +39,6 @@
     hostName = "op5p";
     domain = "jakstys.lt";
     firewall.allowedTCPPorts = [22];
+    hostId = "abefef01";
   };
 }
diff --git a/hosts/vm/configuration.nix b/hosts/vm/configuration.nix
index 10270fe..d212c83 100644
--- a/hosts/vm/configuration.nix
+++ b/hosts/vm/configuration.nix
@@ -45,5 +45,6 @@
     hostName = "vm";
     domain = "jakstys.lt";
     firewall.allowedTCPPorts = [22];
+    hostId = "abefef01";
   };
 }
diff --git a/hosts/vno1-op5p/configuration.nix b/hosts/vno1-op5p/configuration.nix
index f0aa0d7..7e8dca4 100644
--- a/hosts/vno1-op5p/configuration.nix
+++ b/hosts/vno1-op5p/configuration.nix
@@ -83,5 +83,6 @@ in {
     hostName = "vno1-op5p";
     domain = "jakstys.lt";
     firewall.allowedTCPPorts = [22];
+    hostId = "81e10bcc";
   };
 }
diff --git a/modules/base/default.nix b/modules/base/default.nix
index ca64d88..980012d 100644
--- a/modules/base/default.nix
+++ b/modules/base/default.nix
@@ -49,6 +49,8 @@ in {
       };
 
       kernelPackages = lib.mkDefault pkgs.zfs.latestCompatibleLinuxPackages;
+
+      supportedFilesystems = ["zfs" "btrfs"];
     };
 
     nixpkgs.config.allowUnfree = true;