diff --git a/tools/chatgui/tests/test_runtime_deploy.sh b/tools/chatgui/tests/test_runtime_deploy.sh
index 4f64b1e2..be16d8e4 100644
--- a/tools/chatgui/tests/test_runtime_deploy.sh
+++ b/tools/chatgui/tests/test_runtime_deploy.sh
@@ -3,13 +3,17 @@
 set -euo pipefail
 source_dir=$(cd "$(dirname "$0")/.." && pwd)
 fixture_root=$(mktemp -d)
-trap 'rm -rf -- "$fixture_root"' EXIT
+trap 'test_rc=$?; if [ "$test_rc" -eq 0 ]; then rm -rf -- "$fixture_root"; else
+    echo "ERROR: deployment fixture retained: $fixture_root" >&2
+    [ -z "${case_dir:-}" ] || tail -60 "$case_dir/output.log" >&2
+fi' EXIT
 mkdir -p "$fixture_root/commands"
 cat > "$fixture_root/commands/cmake" <<'SH'
 #!/bin/bash
 set -eu
 if [ "$1" = --build ]; then
     printf 'DLL Name: Qt%sWidgets.dll\nDLL Name: Qt%sNetwork.dll\n' "$DEPLOY_MAJOR" "$DEPLOY_MAJOR" > "$2/vibechat.exe"
+    printf 'DLL Name: libgcc_s_seh-1.dll\nDLL Name: libwinpthread-1.dll\nDLL Name: librlottie.dll\nDLL Name: zlib1.dll\nDLL Name: libcrypto-3.dll\n' >> "$2/vibechat.exe"
 else
     while [ "$1" != -B ]; do shift; done
     mkdir -p "$2"
@@ -25,6 +29,7 @@ chmod +x "$fixture_root/commands/"*
 prepare_case() {
     case_dir="$fixture_root/Qt$1 package"; prefix="$case_dir/ucrt64"
     mkdir -p "$case_dir/rlottie_build" "$prefix/bin" "$prefix/share/qt$1/plugins/platforms" "$prefix/share/qt$1/plugins/imageformats"
+    cp "$fixture_root/commands/objdump" "$prefix/bin/objdump"
     cp "$source_dir/build.sh" "$source_dir/compiler_runtime.sh" "$case_dir/"
     printf 'DLL Name: KERNEL32.dll\n' > "$case_dir/rlottie_build/librlottie.dll"
     printf 'fixture\n' > "$case_dir/setup_firewall.bat"