diff --git a/flake.nix b/flake.nix
index d4b0aa0..c0aa52d 100644
--- a/flake.nix
+++ b/flake.nix
@@ -45,9 +45,9 @@
       # (hostName, hostId, per-machine secrets). Every build type except
       # nix-cache itself consumes the nix-cache substituter and remote
       # builder.
-      mkTarget = { platform, buildType, hostPath, homeFile ? ./modules/common/home.nix }:
+      mkTarget = { platform, buildType, hostPath, homeFile ? ./modules/common/home.nix, nameSuffix ? "" }:
         let
-          flakeTarget = "${platform}-${buildType}";
+          flakeTarget = "${platform}-${buildType}${nameSuffix}";
         in
         nixpkgs.lib.nixosSystem {
           inherit system;
@@ -131,8 +131,8 @@
 
         lxc-tor-relay = mkTarget { platform = "lxc"; buildType = "tor-relay"; hostPath = ./hosts/tor-relay/host.nix; };
 
-        proxmox-ha-server-1 = mkTarget { platform = "proxmox"; buildType = "ha-server"; hostPath = ./hosts/ha-server-1/host.nix; };
-        proxmox-ha-server-2 = mkTarget { platform = "proxmox"; buildType = "ha-server"; hostPath = ./hosts/ha-server-2/host.nix; };
+        proxmox-ha-server-1 = mkTarget { platform = "proxmox"; buildType = "ha-server"; hostPath = ./hosts/ha-server-1/host.nix; nameSuffix = "-1"; };
+        proxmox-ha-server-2 = mkTarget { platform = "proxmox"; buildType = "ha-server"; hostPath = ./hosts/ha-server-2/host.nix; nameSuffix = "-2"; };
       };
 
       # Auto-install environments (migrated from the former nix-auto-installer