Use overlay

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/jupiter-vps/configs/podman/prometheus/default.nix

@@ -1,7 +1,4 @@
-{ inputs, system, ... }:
-let
-  selfPkgs = inputs.self.packages.${system};
-in
+{ pkgs, ... }:
 {
   boot.kernelParams = [ "psi=1" ];
 
@@ -12,7 +9,7 @@ in
 
   virtualisation.quadlet.containers = {
     prometheus-node-exporter.containerConfig = {
-      image = "docker-archive:${selfPkgs.docker-prometheus-node-exporter}";
+      image = "docker-archive:${pkgs.dockerImages.prometheus-node-exporter}";
       # Allow collecting host metrics, port :9100 by default
       networks = [ "host" ];
       podmanArgs = [
@@ -49,7 +46,7 @@ in
     };
 
     prometheus-podman-exporter.containerConfig = {
-      image = "docker-archive:${selfPkgs.docker-prometheus-podman-exporter}";
+      image = "docker-archive:${pkgs.dockerImages.prometheus-podman-exporter}";
       publishPorts = [ "9882:9882/tcp" ];
       volumes = [ "/run/podman/podman.sock:/run/podman/podman.sock:ro" ];
       exec = [ "--collector.enable-all" ];

hosts/jupiter-vps/default.nix

@@ -1,5 +1,11 @@
 { inputs, lib, ... }:
 {
+  nixpkgs.overlays = [
+    inputs.lib.overlays.default
+    inputs.self.overlays.default
+    inputs.nur.overlays.default
+  ];
+
   imports = [
     inputs.disko.nixosModules.disko
     ./format.nix