diff --git a/nixos/servnerr-3/configuration.nix b/nixos/servnerr-3/configuration.nix
index 07c4047..2096516 100644
--- a/nixos/servnerr-3/configuration.nix
+++ b/nixos/servnerr-3/configuration.nix
@@ -4,8 +4,7 @@
 
 { lib, pkgs, ... }:
 
-let
-  vars = import ./lib/vars.nix;
+let vars = import ./lib/vars.nix;
 
 in {
   imports = [
@@ -136,10 +135,7 @@ in {
     RuntimeWatchdogSec=60s
   '';
 
-  virtualisation = {
-    docker.enable = true;
-    libvirtd.enable = true;
-  };
+  virtualisation.libvirtd.enable = true;
 
   # root SSH key for remote builds.
   users.users.root.openssh.authorizedKeys.keys = [
diff --git a/nixos/servnerr-3/containers.nix b/nixos/servnerr-3/containers.nix
index 42b9f7e..6246404 100644
--- a/nixos/servnerr-3/containers.nix
+++ b/nixos/servnerr-3/containers.nix
@@ -40,12 +40,15 @@
     };
   };
 
-  docker-containers = {
-    # promlens running on TCP/9091 adjacent to Prometheus.
-    promlens = {
-      image = "promlabs/promlens";
-      ports = [ "9091:8080" ];
-      volumes = [ "/var/lib/promlens:/var/lib/promlens" ];
+  virtualisation.oci-containers = {
+    backend = "podman";
+    containers = {
+      # promlens running on TCP/9091 adjacent to Prometheus.
+      promlens = {
+        image = "promlabs/promlens";
+        ports = [ "9091:8080" ];
+        volumes = [ "/var/lib/promlens:/var/lib/promlens" ];
+      };
     };
   };
 }