diff --git a/roles/libvirt/tasks/main.yml b/roles/libvirt/tasks/main.yml
index 29e9080..c820aa7 100644
--- a/roles/libvirt/tasks/main.yml
+++ b/roles/libvirt/tasks/main.yml
@@ -16,6 +16,11 @@
   with_items: "{{ libvirt_users }}"
   when: libvirt_users is defined
 
+- name: Check for NODOWNLOAD file
+  stat:
+    path: /var/lib/libvirt/images/NODOWNLOAD
+  register: NODOWNLOAD
+
 - name: Download GNU/Linux ISOs
   get_url:
     url: "{{ item.url }}"
@@ -24,4 +29,12 @@
     owner: libvirt-qemu
     group: libvirt-qemu
   loop: "{{ libvirt_isos }}"
-  when: libvirt_isos is defined
+  register: download_isos
+  when: libvirt_isos is defined and NODOWNLOAD.stat.exists == false
+
+# Prevent downloaded ISOs from being rehashed every run
+- name: Create NODOWNLOAD file
+  file:
+    path: /var/lib/libvirt/images/NODOWNLOAD
+    state: touch
+  when: download_isos.changed