diff --git a/taskcluster/taskgraph/manifests/firefox_candidates.yml b/taskcluster/taskgraph/manifests/firefox_candidates.yml
index 7b338e531522..c26a668fe3bc 100644
--- a/taskcluster/taskgraph/manifests/firefox_candidates.yml
+++ b/taskcluster/taskgraph/manifests/firefox_candidates.yml
@@ -200,6 +200,9 @@ mapping:
     target.normandy.json:
         <<: *default
         description: "Metadata about the Normandy client of this build"
+        only_for_platforms:
+            - linux64-shippable
+            - win64-shippable
         pretty_name: firefox-${version}.normandy.json
         checksums_path: ${path_platform}/${locale}/target.normandy.json
     target_info.txt:
diff --git a/taskcluster/taskgraph/manifests/firefox_nightly.yml b/taskcluster/taskgraph/manifests/firefox_nightly.yml
index ed4739f42f3e..e4d9963e2a0b 100644
--- a/taskcluster/taskgraph/manifests/firefox_nightly.yml
+++ b/taskcluster/taskgraph/manifests/firefox_nightly.yml
@@ -196,6 +196,9 @@ mapping:
     target.normandy.json:
         <<: *default
         description: "Metadata about the Normandy client of this build"
+        only_for_platforms:
+            - linux64-shippable
+            - win64-shippable
         pretty_name: firefox-${version}.normandy.json
         checksums_path: firefox-${version}.normandy.json
     target_info.txt: