diff --git a/.gitea/workflows/testflight-release.yml b/.gitea/workflows/testflight-release.yml
index 2370891..742d253 100644
--- a/.gitea/workflows/testflight-release.yml
+++ b/.gitea/workflows/testflight-release.yml
@@ -91,7 +91,7 @@ jobs:
           developer_dir="$(xcode-select -p)"
           signing_dir="$(mktemp -d "${RUNNER_TEMP:-${TMPDIR:-/tmp}}/sybil-signing.XXXXXX")"
           mkdir -p "${HOME}/Library/Keychains"
-          keychain_name="${HOME}/Library/Keychains/${SIGNING_KEYCHAIN}-${GITHUB_RUN_ID:-$(uuidgen)}.keychain"
+          keychain_name="${HOME}/Library/Keychains/login.keychain"
           certificate_path="${signing_dir}/appstore-signing.p12"
           wwdr_certificate_path="${signing_dir}/AppleWWDRCAG3.cer"
           profile_path="${signing_dir}/Sybil_AppStore_CI.mobileprovision"
diff --git a/ios/fastlane/CI.md b/ios/fastlane/CI.md
index a147561..33004c4 100644
--- a/ios/fastlane/CI.md
+++ b/ios/fastlane/CI.md
@@ -13,14 +13,15 @@ git tag release/v1.10.0
 git push origin release/v1.10.0
 ```
 
-The release job runs on the `xcode` runner label, imports the signing p12 into
-a temporary per-user keychain, makes that keychain the user default for the
+The release job runs on the `xcode` runner label, creates the runner user's
+login keychain from Gitea secrets, makes that keychain the user default for the
 duration of the job, installs the App Store provisioning profile in both the
 legacy MobileDevice directory and the Xcode UserData directory used by newer
 Xcode releases, builds and uploads the app with fastlane, then creates or
 updates the matching Gitea release with the generated IPA as an asset. The job
-restores the previous user default keychain and deletes the temporary signing
-keychain and installed profiles in an `always()` cleanup step.
+restores the previous user default keychain and deletes the user login keychain
+and installed profiles in an `always()` cleanup step. No signing material is
+installed into the system keychain.
 
 Required repository secrets: