diff --git a/tools/chatgui/build.sh b/tools/chatgui/build.sh
index 8fe5511a..26777478 100755
--- a/tools/chatgui/build.sh
+++ b/tools/chatgui/build.sh
@@ -37,20 +37,24 @@ if [ -x "$WINDEPLOYQT" ]; then
     if [ $RC -eq 0 ]; then
         log "  OK: windeployqt completed"
     else
-        log "  WARN: windeployqt failed (exit $RC), trying manual copy..."
-        for dll in Qt5Core Qt5Gui Qt5Widgets Qt5Network; do
-            cp "/ucrt64/bin/${dll}.dll" "$BUILD_DIR/" 2>/dev/null && log "  OK: ${dll}.dll" || log "  WARN: ${dll}.dll not found"
-        done
-        for dll in libssl-3-x64 libcrypto-3-x64 zlib1; do
-            cp "/ucrt64/bin/${dll}.dll" "$BUILD_DIR/" 2>/dev/null || true
-        done
+        log "  WARN: windeployqt failed (exit $RC)"
     fi
 else
     log "  WARN: $WINDEPLOYQT not found (install: pacman -S mingw-w64-ucrt-x86_64-qt5-tools)"
-    log "  Copying DLLs manually..."
-    for dll in Qt5Core Qt5Gui Qt5Widgets Qt5Network libssl-3-x64 libcrypto-3-x64 zlib1; do
-        cp "/ucrt64/bin/${dll}.dll" "$BUILD_DIR/" 2>/dev/null && log "  OK: ${dll}.dll" || log "  WARN: ${dll}.dll not found"
-    done
+    log "  Using objdump to find dependencies..."
+    DLL_LIST=$(objdump -p "$BUILD_DIR/chatgui.exe" 2>/dev/null | grep "DLL Name:" | awk '{print $3}')
+    if [ -n "$DLL_LIST" ]; then
+        for dll in $DLL_LIST; do
+            # skip system DLLs
+            case "$dll" in KERNEL32.dll|msvcrt.dll|USER32.dll|GDI32.dll|SHELL32.dll|ADVAPI32.dll|WS2_32.dll|ole32.dll|OLEAUT32.dll|IPHLPAPI.DLL|BCRYPT.dll|dbghelp.dll) continue ;; esac
+            cp "/ucrt64/bin/$dll" "$BUILD_DIR/" 2>/dev/null && log "  OK: $dll" || \
+              cp "/mingw64/bin/$dll" "$BUILD_DIR/" 2>/dev/null || \
+              log "  WARN: $dll not found"
+        done
+    else
+        log "  FAIL: objdump failed, cannot determine dependencies"
+        exit 1
+    fi
 fi
 cp "$SRC_DIR/rlottie_build/librlottie.dll" "$BUILD_DIR/" 2>/dev/null && log "  OK: librlottie.dll" || log "  WARN: librlottie.dll not found"