diff --git a/ios/default.nix b/ios/default.nix
index 92775ccf1..60d5777c3 100644
--- a/ios/default.nix
+++ b/ios/default.nix
@@ -269,7 +269,7 @@ nixpkgs.runCommand "${executableName}-app" (rec {
     cp -LR "$(dirname $0)/../${executableName}.app" $tmpdir
     chmod -R +w "$tmpdir/${executableName}.app"
     mkdir -p "$tmpdir/${executableName}.app/config"
-    ${../scripts/run-in-ios-sim} "$tmpdir/${executableName}.app"
+    ${../scripts/run-in-ios-sim} "$tmpdir/${executableName}.app" "${bundleIdentifier}"
   '';
   portableDeployScript = nixpkgs.writeText "make-portable-deploy" ''
     #!/usr/bin/env bash
diff --git a/scripts/run-in-ios-sim b/scripts/run-in-ios-sim
index b55d22825..8b6a1552d 100755
--- a/scripts/run-in-ios-sim
+++ b/scripts/run-in-ios-sim
@@ -6,6 +6,11 @@ set -euo pipefail
 name="${1##*/}"
 name="${name%.app}"
 
+bundleIdentifier="$name"
+if [ "$#" = 2 ]; then
+  bundleIdentifier="$2"
+fi
+
 runtime="$(xcrun simctl list runtimes -j | jq -r '.runtimes[].identifier' | head -n1)"
 uuid="$(xcrun simctl create "$name" com.apple.CoreSimulator.SimDeviceType.iPhone-8 "$runtime")"
 
@@ -26,4 +31,4 @@ echo Installing "$name".app >&2
 xcrun simctl install "$uuid" "$1"
 
 echo Launching "$name" >&2
-xcrun simctl launch --console "$uuid" "$name"
+xcrun simctl launch --console "$uuid" "$bundleIdentifier"