gimp3, disable channels

modules/hardware/ryzen.nix

@@ -0,0 +1,9 @@
+{ config, pkgs, ... }: {
+
+  boot = {
+    extraModulePackages = with config.boot.kernelPackages; [ zenpower ];
+    kernelModules = [ "zenpower" ];
+    blacklistedKernelModules = [ "k10temp" ];
+  };
+  environment.systemPackages = with pkgs; [ zenmonitor ];
+}

modules/nix/settings.nix

@@ -32,6 +32,7 @@ in {
         dates = "weekly";
         options = "--delete-older-than 30d";
       };
+      channel.enable = false;
       extraOptions = ''
         min-free = ${toString (100 * 1024 * 1024)}
         max-free = ${toString (1024 * 1024 * 1024)}