diff --git a/mobile/fastlane/Fastfile b/mobile/fastlane/Fastfile
index 7d7aebc6e..148f2e1c9 100644
--- a/mobile/fastlane/Fastfile
+++ b/mobile/fastlane/Fastfile
@@ -36,8 +36,7 @@ platform :ios do
     team_id = ENV.fetch("APPLE_TEAM_ID")
 
     # Fetch (or create) the App Store distribution profile via the API key and
-    # install it locally. sigh records the bundle-id → profile-name mapping in
-    # SIGH_PROFILE_MAPPING, which we feed to the manual export below.
+    # install it locally, then feed its name to the manual archive + export.
     get_provisioning_profile(
       api_key: api_key,
       app_identifier: BUNDLE_ID,
@@ -47,11 +46,17 @@ platform :ios do
     # doesn't exist in this fastlane version).
     profile_name = lane_context[SharedValues::SIGH_NAME]
 
+    # Manual signing: the archive needs the team, profile, and signing style set
+    # explicitly (no -allowProvisioningUpdates). Without DEVELOPMENT_TEAM the
+    # archive fails: "Signing for Orca requires a development team".
     build_app(
       workspace: WORKSPACE,
       scheme: SCHEME,
       configuration: "Release",
       export_method: "app-store",
+      xcargs: "DEVELOPMENT_TEAM=#{team_id} " \
+        "CODE_SIGN_STYLE=Manual " \
+        "PROVISIONING_PROFILE_SPECIFIER='#{profile_name}'",
       export_options: {
         teamID: team_id,
         signingStyle: "manual",