diff --git a/samples/base-from-yum.json b/samples/base-from-yum.json
index 1b0fe52f..3698e77c 100644
--- a/samples/base-from-yum.json
+++ b/samples/base-from-yum.json
@@ -6,12 +6,12 @@
         "options": {
           "releasever": "27",
           "basearch": "x86_64",
-          "repos": {
-            "fedora": {
+          "repos": [
+            {
               "baseurl": "https://archives.fedoraproject.org/pub/archive/fedora/linux/releases/$releasever/Everything/$basearch/os/",
               "gpgkey": "860E 19B0 AFA8 00A1 7518 81A6 F55E 7430 F528 2EE4"
             }
-          },
+          ],
           "packages": [
             "dnf",
             "systemd",
diff --git a/samples/build-from-yum.json b/samples/build-from-yum.json
index 2e01cc4f..235c81da 100644
--- a/samples/build-from-yum.json
+++ b/samples/build-from-yum.json
@@ -5,12 +5,12 @@
       "options": {
         "releasever": "27",
         "basearch": "x86_64",
-        "repos": {
-          "fedora": {
+        "repos": [
+          {
             "baseurl": "https://archives.fedoraproject.org/pub/archive/fedora/linux/releases/$releasever/Everything/$basearch/os/",
             "gpgkey": "860E 19B0 AFA8 00A1 7518 81A6 F55E 7430 F528 2EE4"
           }
-        },
+        ],
         "packages": [
           "dnf",
           "systemd",
diff --git a/stages/org.osbuild.yum b/stages/org.osbuild.yum
index b5b64ae7..27d29fff 100755
--- a/stages/org.osbuild.yum
+++ b/stages/org.osbuild.yum
@@ -35,8 +35,8 @@ def main(tree, options):
     verbosity = options.get("verbosity", "info")
 
     with open("/tmp/yum.conf", "w") as conf:
-        for repoid, repo in repos.items():
-            write_repofile(conf, repoid, repo)
+        for repoid, repo in enumerate(repos):
+            write_repofile(conf, f"repo{repoid}", repo)
 
     script = f"""
         set -e