more qcow/installer-iso fixes

Signed-off-by: ahuston-0 <aliceghuston@gmail.com>

systems/artemision/configuration.nix

@@ -1,4 +1,9 @@
-{ config, pkgs, ... }:
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
 {
   imports = [
     ./programs.nix
@@ -45,7 +50,7 @@
       }) { inherit (pkgs) system; }).fwupd;
 
     fprintd.enable = true;
-    openssh.enable = false;
+    openssh.enable = lib.mkDefault false;
 
     spotifyd = {
       enable = true;

systems/palatine-hill/configuration.nix

@@ -43,7 +43,7 @@ in
       "i915.enable_guc=2"
     ];
     kernel.sysctl = {
-      "vm.overcommit_memory" = 1;
+      "vm.overcommit_memory" = lib.mkForce 1;
       "vm.swappiness" = 10;
     };
     extraModprobeConfig = ''