diff --git a/helmfile/apps/services/helmfile.yaml b/helmfile/apps/services/helmfile.yaml
index 86615600..81cdf603 100644
--- a/helmfile/apps/services/helmfile.yaml
+++ b/helmfile/apps/services/helmfile.yaml
@@ -40,7 +40,7 @@ repositories:
   - name: "postfix-repo"
     oci: true
     url: >-
-      {{ env "PRIVATE_CHART_REPOSITORY_URL" |
+      {{ env "PRIVATE_IMAGE_REGISTRY_URL" |
          default "external-registry.souvap-univention.de/sovereign-workplace/souvap/tooling/charts/postfix" }}
     verify: true
     keyring: "../../files/gpg-pubkeys/souvap-univention-de.gpg"