diff --git a/inventory/group_vars/buildvm-stg b/inventory/group_vars/buildvm-stg
index 08562ba89a..0d2a96f9de 100644
--- a/inventory/group_vars/buildvm-stg
+++ b/inventory/group_vars/buildvm-stg
@@ -34,6 +34,9 @@ csi_relationship: |
   * Several services rely on the builders, including koschei, Bodhi, Tagger, SCM, Darkserver.
   * Produces automated builds of packages for the architecture listed. Builders can be scaled by adding new
 
+# this is to enable nested virt, which we need for some builds
+virt_install_command: "{{ virt_install_command_one_nic }} --cpu=host-passthrough,+vmx"
+
 # These variables are for koji-containerbuild/osbs
 osbs_fqdn: "osbs-dev.fedorainfracloud.org"
 docker_registry: "osbs-dev.fedorainfracloud.org"
diff --git a/inventory/host_vars/buildvm-01.stg.phx2.fedoraproject.org b/inventory/host_vars/buildvm-01.stg.phx2.fedoraproject.org
index 276bfc5d70..cabfd5db9e 100644
--- a/inventory/host_vars/buildvm-01.stg.phx2.fedoraproject.org
+++ b/inventory/host_vars/buildvm-01.stg.phx2.fedoraproject.org
@@ -1,3 +1,3 @@
 ---
-vmhost: virthost11.phx2.fedoraproject.org
+vmhost: virthost04.phx2.fedoraproject.org
 eth0_ip: 10.5.126.14
diff --git a/inventory/host_vars/buildvm-02.stg.phx2.fedoraproject.org b/inventory/host_vars/buildvm-02.stg.phx2.fedoraproject.org
new file mode 100644
index 0000000000..8e1a852b23
--- /dev/null
+++ b/inventory/host_vars/buildvm-02.stg.phx2.fedoraproject.org
@@ -0,0 +1,3 @@
+---
+vmhost: virthost04.phx2.fedoraproject.org
+eth0_ip: 10.5.126.223
diff --git a/inventory/host_vars/buildvm-03.stg.phx2.fedoraproject.org b/inventory/host_vars/buildvm-03.stg.phx2.fedoraproject.org
new file mode 100644
index 0000000000..74398ac0e5
--- /dev/null
+++ b/inventory/host_vars/buildvm-03.stg.phx2.fedoraproject.org
@@ -0,0 +1,3 @@
+---
+vmhost: virthost04.phx2.fedoraproject.org
+eth0_ip: 10.5.126.224
diff --git a/inventory/host_vars/buildvm-04.stg.phx2.fedoraproject.org b/inventory/host_vars/buildvm-04.stg.phx2.fedoraproject.org
new file mode 100644
index 0000000000..43f8e3ca9a
--- /dev/null
+++ b/inventory/host_vars/buildvm-04.stg.phx2.fedoraproject.org
@@ -0,0 +1,3 @@
+---
+vmhost: virthost04.phx2.fedoraproject.org
+eth0_ip: 10.5.126.225
diff --git a/inventory/host_vars/buildvm-05.stg.phx2.fedoraproject.org b/inventory/host_vars/buildvm-05.stg.phx2.fedoraproject.org
new file mode 100644
index 0000000000..4d1a0873e8
--- /dev/null
+++ b/inventory/host_vars/buildvm-05.stg.phx2.fedoraproject.org
@@ -0,0 +1,3 @@
+---
+vmhost: virthost04.phx2.fedoraproject.org
+eth0_ip: 10.5.126.226
diff --git a/inventory/host_vars/virthost04.phx2.fedoraproject.org b/inventory/host_vars/virthost04.phx2.fedoraproject.org
new file mode 100644
index 0000000000..086394546b
--- /dev/null
+++ b/inventory/host_vars/virthost04.phx2.fedoraproject.org
@@ -0,0 +1,4 @@
+---
+# This virthost only has stg instances, so it doesn't freeze
+freezes: false
+nested: true