diff --git a/ansible/roles/radicle-ci-node/defaults/main.yaml b/ansible/roles/radicle-ci-node/defaults/main.yaml
new file mode 100644
index 00000000..5d8f749c
--- /dev/null
+++ b/ansible/roles/radicle-ci-node/defaults/main.yaml
@@ -0,0 +1,5 @@
+# Number of virtual CPUs Ambient virtual machines should have.
+radicle_ci_ambient_cpus: 1
+
+# Amount of memory an Ambient virtual machine should have.
+radicle_ci_ambient_memory: 1G
diff --git a/ansible/roles/radicle-ci-node/files/ambient-config.yaml b/ansible/roles/radicle-ci-node/templates/ambient-config.yaml
similarity index 64%
rename from ansible/roles/radicle-ci-node/files/ambient-config.yaml
rename to ansible/roles/radicle-ci-node/templates/ambient-config.yaml
index 1c9c049b..ea4e937a 100644
--- a/ansible/roles/radicle-ci-node/files/ambient-config.yaml
+++ b/ansible/roles/radicle-ci-node/templates/ambient-config.yaml
@@ -4,7 +4,7 @@ artifacts_max_size: 1G
 cache_max_size: 50G
 uefi: true
 qemu:
-  cpus: 1
-  memory: 1G
+  cpus: {{ radicle_ci_ambient_cpus }}
+  memory: {{ radicle_ci_ambient_memory }}
 lint: false