diff --git a/api-daemon/provisioner/examples/script/3-debootstrap.py b/api-daemon/provisioner/examples/script/3-debootstrap.py
index e9c6b522..79353147 100644
--- a/api-daemon/provisioner/examples/script/3-debootstrap.py
+++ b/api-daemon/provisioner/examples/script/3-debootstrap.py
@@ -485,7 +485,7 @@ class VMBuilderScript(VMBuilder):
             f"Installing system with debootstrap: debootstrap --include={','.join(deb_packages)} {deb_release} {temporary_directory} {deb_mirror}"
         )
         os.system(
-            "debootstrap --include={','.join(deb_packages)} {deb_release} {temporary_directory} {deb_mirror}"
+            f"debootstrap --include={','.join(deb_packages)} {deb_release} {temporary_directory} {deb_mirror}"
         )
 
         # Bind mount the devfs so we can grub-install later