diff --git a/tools/chatgui/build.sh b/tools/chatgui/build.sh
index 9885a53c..f8000c3a 100755
--- a/tools/chatgui/build.sh
+++ b/tools/chatgui/build.sh
@@ -57,13 +57,30 @@ fi
 # а pacman-ffmpeg той же мажорной версии в /ucrt64/bin дал бы неверный набор кодеков.
 FFMPEG_BIN="$SRC_DIR/ffmpeg/ffmpeg_build/install/bin"
 OBJDUMP="objdump"; [ -n "${MSYSTEM_PREFIX:-}" ] && OBJDUMP="$MSYSTEM_PREFIX/bin/objdump"
-shopt -s nocasematch
+command -v "$OBJDUMP" >/dev/null 2>&1 || { log "  ERROR: $OBJDUMP not found"; exit 1; }
+shopt -s nocasematch nullglob
+# Обновляем весь комплект FFmpeg, включая DLL, не импортируемые напрямую приложением.
+for src in "$FFMPEG_BIN/"*.dll; do
+    cp "$src" "$BUILD_DIR/" || { log "  ERROR: failed to copy $src"; exit 1; }
+    log "  OK: $(basename "$src") (ffmpeg)"
+done
 log "  Resolving non-Qt dependencies recursively..."
-todo="$BUILD_DIR/vibechat.exe"
-while [ -n "$todo" ]; do
-    next_todo=""
-    for src in $todo; do
-        for dep in $($OBJDUMP -p "$src" 2>/dev/null | grep "DLL Name:" | awk '{print $3}'); do
+# Проверяем также уже скопированные DLL: наличие файла не гарантирует наличие его зависимостей.
+todo=("$BUILD_DIR/vibechat.exe" "$BUILD_DIR/"*.dll)
+declare -A scanned=()
+MISSING=0
+for ((i = 0; i < ${#todo[@]}; i++)); do
+    src="${todo[i]}"
+    key="${src,,}"
+    [ -n "${scanned[$key]:-}" ] && continue
+    scanned[$key]=1
+    if ! imports=$("$OBJDUMP" -p "$src" 2>&1); then
+        log "  ERROR: cannot inspect $src: $imports"
+        MISSING=1
+        continue
+    fi
+    log "  Checking: $src"
+    while read -r dep; do
             case "$dep" in
                 kernel32.dll|msvcrt.dll|msvcp140.dll|vcruntime140.dll|ucrtbase.dll|\
                 user32.dll|gdi32.dll|gdi32full.dll|shell32.dll|shlwapi.dll|advapi32.dll|\
@@ -75,19 +92,27 @@ while [ -n "$todo" ]; do
                 wtsapi32.dll|mpr.dll|api-ms-win-*)
                     continue ;;
             esac
-            [ -f "$BUILD_DIR/$dep" ] && continue
-            if [ -d "$FFMPEG_BIN" ] && cp "$FFMPEG_BIN/$dep" "$BUILD_DIR/" 2>/dev/null; then
-                log "  OK: $dep (ffmpeg)"; next_todo="$next_todo $BUILD_DIR/$dep"
-            elif cp "/ucrt64/bin/$dep" "$BUILD_DIR/" 2>/dev/null; then
-                log "  OK: $dep"; next_todo="$next_todo $BUILD_DIR/$dep"
-            elif cp "/mingw64/bin/$dep" "$BUILD_DIR/" 2>/dev/null; then
-                log "  OK: $dep (mingw64)"; next_todo="$next_todo $BUILD_DIR/$dep"
+            if [ ! -f "$BUILD_DIR/$dep" ]; then
+                dep_src=""
+                for dir in "$FFMPEG_BIN" /ucrt64/bin "$SRC_DIR/rlottie_build"; do
+                    if [ -f "$dir/$dep" ]; then
+                        dep_src="$dir/$dep"
+                        break
+                    fi
+                done
+                if [ -z "$dep_src" ]; then
+                    log "  ERROR: $src requires $dep; not found in FFmpeg, UCRT64 or rlottie directories"
+                    MISSING=1
+                    continue
+                fi
+                cp "$dep_src" "$BUILD_DIR/" || { log "  ERROR: failed to copy $dep_src"; exit 1; }
+                log "  OK: $dep (from $dep_src; required by $src)"
             fi
-        done
-    done
-    todo="$next_todo"
+            todo+=("$BUILD_DIR/$dep")
+    done < <(awk '/DLL Name:/ {print $3}' <<< "$imports")
 done
-shopt -u nocasematch
+shopt -u nocasematch nullglob
+[ "$MISSING" -eq 0 ] || { log "  ERROR: runtime DLL deployment incomplete"; exit 1; }
 # Qt platform plugin (loaded dynamically, not in import table)
 mkdir -p "$BUILD_DIR/platforms"
 for d in /ucrt64/share/qt5/plugins /ucrt64/lib/qt5/plugins; do
@@ -101,7 +126,7 @@ log "  Verifying required non-Qt DLLs..."
 MISSING=0
 if [ -d "$FFMPEG_BIN" ]; then
     for d in avcodec-*.dll avformat-*.dll avutil-*.dll swscale-*.dll swresample-*.dll; do
-        if ls "$BUILD_DIR/$d" >/dev/null 2>&1; then
+        if compgen -G "$BUILD_DIR/$d" >/dev/null; then
             log "  OK: $d"
         else
             log "  WARN: $d MISSING in build dir"; MISSING=1
@@ -111,7 +136,7 @@ else
     log "  SKIP: FFmpeg not built — no FFmpeg DLLs expected"
 fi
 for d in libstdc++-6.dll libgcc_s_*.dll libwinpthread-1.dll librlottie.dll zlib1.dll libcrypto-*.dll; do
-    if ls "$BUILD_DIR/$d" >/dev/null 2>&1; then
+    if compgen -G "$BUILD_DIR/$d" >/dev/null; then
         log "  OK: $d"
     else
         log "  WARN: $d MISSING in build dir"; MISSING=1