diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 9b19e44..bbac26d 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -77,7 +77,9 @@ downloads:
     - |-
       for vars in $(find distros/ -name '*.pkrvars.hcl'); do
         file=$(echo var.iso.url | packer console -var-file=${vars} -config-type=hcl2 sources/)
-        files+=("-O" "${file}")
+        if [ ! -e "cache/${file}" ]; then
+          files+=("-O" "${file}")
+        fi
       done
     - mkdir -p cache
     - pushd cache
diff --git a/sources/qemu.pkr.hcl b/sources/qemu.pkr.hcl
index 9a69ff3..bb3ecba 100644
--- a/sources/qemu.pkr.hcl
+++ b/sources/qemu.pkr.hcl
@@ -4,7 +4,7 @@ variable "qemu_accelerator" {
 }
 
 source "qemu" "amd64" {
-  iso_url          = var.iso.url
+  iso_urls         = [ "cache/${basename(var.iso.url)}", var.iso.url]
   iso_target_path  = "cache/${basename(var.iso.url)}"
   iso_checksum     = var.iso.checksum
   output_directory = "output/libvirt/${local.name}"