diff --git a/README.md b/README.md
index f3f115e..d33d907 100644
--- a/README.md
+++ b/README.md
@@ -15,4 +15,4 @@ installed inside it, Tenks' role dependencies can be installed by
 
 Currently, Tenks does not have a CLI or wrapper. A virtual cluster can be
 deployed by configuring the variables defined in `group_vars/*` as necessary,
-then calling `ansible-playbook --inventory ansible/inventory deploy.yml`.
+then calling `ansible-playbook --inventory ansible/inventory ansible/deploy.yml`.
diff --git a/ansible/deploy_hosts.yml b/ansible/deploy_hosts.yml
index 59939c1..a8cbbdf 100644
--- a/ansible/deploy_hosts.yml
+++ b/ansible/deploy_hosts.yml
@@ -5,7 +5,8 @@
 
 - hosts: libvirt
   tasks:
-    - include_role:
+    - name: Configure host for Libvirt
+      include_role:
         name: stackhpc.libvirt-host
       vars:
         libvirt_host_pools:
diff --git a/ansible/host_setup.yml b/ansible/host_setup.yml
index ca38567..f3a99f7 100644
--- a/ansible/host_setup.yml
+++ b/ansible/host_setup.yml
@@ -28,10 +28,10 @@
         state: running
         enabled: true
       become: true
-  # Return code 127 means the command does not exist. Do this check to avoid
-  # installing Open vSwitch system-wide if the command already exists as a link
-  # to a containerised version of OVS.
-  when: ovs_vsctl_check.rc == 127
+  # Assume a non-zero return code means the command does not exist. Do this
+  # check to avoid installing Open vSwitch system-wide if the command already
+  # exists as a link to a containerised version of OVS.
+  when: ovs_vsctl_check.rc != 0
 
 - name: Configure physical networks
   include_tasks: physical_network.yml
diff --git a/ansible/physical_network.yml b/ansible/physical_network.yml
index 788fc89..f806a55 100644
--- a/ansible/physical_network.yml
+++ b/ansible/physical_network.yml
@@ -40,6 +40,7 @@
 - name: Ensure Open vSwitch bridge exists
   openvswitch_bridge:
     bridge: "{{ tenks_bridge }}"
+  become: true
 
 - name: Connect to existing Linux bridge
   when: source_type == 'linux_bridge'
diff --git a/ansible/roles/virtualbmc-daemon/defaults/main.yml b/ansible/roles/virtualbmc-daemon/defaults/main.yml
index 1bca599..e31f6d9 100644
--- a/ansible/roles/virtualbmc-daemon/defaults/main.yml
+++ b/ansible/roles/virtualbmc-daemon/defaults/main.yml
@@ -1,4 +1,9 @@
 ---
+# List of package dependencies to install.
+# TODO: Make platform-independent.
+vbmcd_packages:
+  - gcc
+  - libvirt-devel
 # The path to the virtualenv in which to install Virtual BMC.
 vbmcd_virtualenv_path:
 # The URL of the upper constraints file to pass to pip when installing Python
diff --git a/ansible/roles/virtualbmc-daemon/tasks/main.yml b/ansible/roles/virtualbmc-daemon/tasks/main.yml
index 6f57966..c850a50 100644
--- a/ansible/roles/virtualbmc-daemon/tasks/main.yml
+++ b/ansible/roles/virtualbmc-daemon/tasks/main.yml
@@ -1,7 +1,10 @@
 ---
-- name: Set service name
-  set_fact:
-    service: vbmcd
+- name: Ensure package dependencies are installed
+  package:
+    name: "{{ item }}"
+    state: installed
+  loop: "{{ vbmcd_packages }}"
+  become: true
 
 - name: Ensure Python requirements are installed
   pip:
diff --git a/ansible/roles/virtualbmc-daemon/vars/main.yml b/ansible/roles/virtualbmc-daemon/vars/main.yml
new file mode 100644
index 0000000..176ea55
--- /dev/null
+++ b/ansible/roles/virtualbmc-daemon/vars/main.yml
@@ -0,0 +1,3 @@
+---
+# The name of the Virtual BMC daemon systemd service.
+service: vbmcd