diff --git a/nixos/tests/virtualbox.nix b/nixos/tests/virtualbox.nix
index 4eb402a7d36e..1c1b0dac7f37 100644
--- a/nixos/tests/virtualbox.nix
+++ b/nixos/tests/virtualbox.nix
@@ -3,18 +3,9 @@
   pkgs ? import ../.. { inherit system config; },
   debug ? false,
   enableUnfree ? false,
-  # Nested KVM virtualization (https://www.linux-kvm.org/page/Nested_Guests)
-  # requires a modprobe flag on the build machine: (kvm-amd for AMD CPUs)
-  #   boot.extraModprobeConfig = "options kvm-intel nested=Y";
-  # Without this VirtualBox will use SW virtualization and will only be able
-  # to run 32-bit guests.
-  useKvmNestedVirt ? false,
-  # Whether to run 64-bit guests instead of 32-bit. Requires nested KVM.
-  use64bitGuest ? false
+  use64bitGuest ? true
 }:
 
-assert use64bitGuest -> useKvmNestedVirt;
-
 with import ../lib/testing-python.nix { inherit system pkgs; };
 with pkgs.lib;
 
@@ -26,7 +17,8 @@ let
       #!${pkgs.runtimeShell} -xe
       export PATH="${lib.makeBinPath [ pkgs.coreutils pkgs.util-linux ]}"
 
-      mkdir -p /run/dbus
+      mkdir -p /run/dbus /var
+      ln -s /run /var
       cat > /etc/passwd <<EOF
       root:x:0:0::/root:/bin/false
       messagebus:x:1:1::/run/dbus:/bin/false
@@ -200,6 +192,7 @@ let
       systemd.services."vboxtestlog-${name}@" = {
         description = "VirtualBox Test Machine Log For ${name}";
         serviceConfig.StandardInput = "socket";
+        serviceConfig.StandardOutput = "journal";
         serviceConfig.SyslogIdentifier = "GUEST-${name}";
         serviceConfig.ExecStart = "${pkgs.coreutils}/bin/cat";
       };
@@ -226,6 +219,7 @@ let
 
 
       def create_vm_${name}():
+          cleanup_${name}()
           vbm("createvm --name ${name} ${createFlags}")
           vbm("modifyvm ${name} ${vmFlags}")
           vbm("setextradata ${name} VBoxInternal/PDM/HaltOnReset 1")
@@ -233,7 +227,6 @@ let
           vbm("storageattach ${name} ${diskFlags}")
           vbm("sharedfolder add ${name} ${sharedFlags}")
           vbm("sharedfolder add ${name} ${nixstoreFlags}")
-          cleanup_${name}()
 
           ${mkLog "$HOME/VirtualBox VMs/${name}/Logs/VBox.log" "HOST-${name}"}
 
@@ -317,10 +310,7 @@ let
   ];
 
   dhcpScript = pkgs: ''
-    ${pkgs.dhcp}/bin/dhclient \
-      -lf /run/dhcp.leases \
-      -pf /run/dhclient.pid \
-      -v eth0 eth1
+    ${pkgs.dhcpcd}/bin/dhcpcd eth0 eth1
 
     otherIP="$(${pkgs.netcat}/bin/nc -l 1234 || :)"
     ${pkgs.iputils}/bin/ping -I eth1 -c1 "$otherIP"
@@ -359,8 +349,7 @@ let
         vmConfigs = mapAttrsToList mkVMConf vms;
       in [ ./common/user-account.nix ./common/x11.nix ] ++ vmConfigs;
       virtualisation.memorySize = 2048;
-      virtualisation.qemu.options =
-        if useKvmNestedVirt then ["-cpu" "kvm64,vmx=on"] else [];
+      virtualisation.qemu.options = ["-cpu" "kvm64,svm=on,vmx=on"];
       virtualisation.virtualbox.host.enable = true;
       test-support.displayManager.auto.user = "alice";
       users.users.alice.extraGroups = let
@@ -468,7 +457,7 @@ in mapAttrs (mkVBoxTest false vboxVMs) {
 
   headless = ''
     create_vm_headless()
-    machine.succeed(ru("VBoxHeadless --startvm headless & disown %1"))
+    machine.succeed(ru("VBoxHeadless --startvm headless >&2 & disown %1"))
     wait_for_startup_headless()
     wait_for_vm_boot_headless()
     shutdown_vm_headless()
@@ -476,6 +465,8 @@ in mapAttrs (mkVBoxTest false vboxVMs) {
   '';
 
   host-usb-permissions = ''
+    import sys
+
     user_usb = remove_uuids(vbm("list usbhost"))
     print(user_usb, file=sys.stderr)
     root_usb = remove_uuids(machine.succeed("VBoxManage list usbhost"))
diff --git a/pkgs/applications/virtualization/virtualbox/guest-additions/default.nix b/pkgs/applications/virtualization/virtualbox/guest-additions/default.nix
index da9f32b9c685..538ebfa78cf8 100644
--- a/pkgs/applications/virtualization/virtualbox/guest-additions/default.nix
+++ b/pkgs/applications/virtualization/virtualbox/guest-additions/default.nix
@@ -45,26 +45,15 @@ in stdenv.mkDerivation rec {
   patchFlags = [ "-p1" "-d" "src/vboxguest-${version}" ];
 
   unpackPhase = ''
-    ${if stdenv.hostPlatform.system == "i686-linux" || stdenv.hostPlatform.system == "x86_64-linux" then ''
-        isoinfo -J -i $src -x /VBoxLinuxAdditions.run > ./VBoxLinuxAdditions.run
-        chmod 755 ./VBoxLinuxAdditions.run
-        # An overflow leads the is-there-enough-space check to fail when there's too much space available, so fake how much space there is
-        sed -i 's/\$leftspace/16383/' VBoxLinuxAdditions.run
-        ./VBoxLinuxAdditions.run --noexec --keep
-      ''
-      else throw ("Architecture: "+stdenv.hostPlatform.system+" not supported for VirtualBox guest additions")
-    }
+    isoinfo -J -i $src -x /VBoxLinuxAdditions.run > ./VBoxLinuxAdditions.run
+    chmod 755 ./VBoxLinuxAdditions.run
+    # An overflow leads the is-there-enough-space check to fail when there's too much space available, so fake how much space there is
+    sed -i 's/\$leftspace/16383/' VBoxLinuxAdditions.run
+    ./VBoxLinuxAdditions.run --noexec --keep
 
     # Unpack files
     cd install
-    ${if stdenv.hostPlatform.system == "i686-linux" then ''
-        tar xfvj VBoxGuestAdditions-x86.tar.bz2
-      ''
-      else if stdenv.hostPlatform.system == "x86_64-linux" then ''
-        tar xfvj VBoxGuestAdditions-amd64.tar.bz2
-      ''
-      else throw ("Architecture: "+stdenv.hostPlatform.system+" not supported for VirtualBox guest additions")
-    }
+    tar xfvj VBoxGuestAdditions-${if stdenv.hostPlatform.is32bit then "x86" else "amd64"}.tar.bz2
   '';
 
   buildPhase = ''
@@ -158,7 +147,7 @@ in stdenv.mkDerivation rec {
     sourceProvenance = with lib.sourceTypes; [ binaryNativeCode ];
     license = "GPL";
     maintainers = [ lib.maintainers.sander ];
-    platforms = lib.platforms.linux;
-    broken = kernel.kernelAtLeast "5.17";
+    platforms = [ "i686-linux" "x86_64-linux" ];
+    broken = kernel.kernelAtLeast (if stdenv.hostPlatform.is32bit then "5.10" else "5.17");
   };
 }