diff --git a/tools/chatgui/build.sh b/tools/chatgui/build.sh
index 5a1889a1..8d166a2f 100755
--- a/tools/chatgui/build.sh
+++ b/tools/chatgui/build.sh
@@ -74,6 +74,14 @@ COPIED=0
 SCAN_STARTED=$SECONDS
 log "  Scanner: $OBJDUMP; initial files=${#todo[@]}"
 log "  Search directories: $FFMPEG_BIN; /ucrt64/bin; $SRC_DIR/rlottie_build"
+# Большой вывод objdump передаём через файл, чтобы не зависеть от here-string и pipe в MSYS2.
+if IMPORT_DUMP=$(mktemp); then
+    log "  Temporary import dump: $IMPORT_DUMP"
+else
+    log "  ERROR: cannot create temporary file for DLL inspection"
+    exit 1
+fi
+trap 'rm -f -- "$IMPORT_DUMP" || log "  WARN: cannot remove temporary import dump: $IMPORT_DUMP"' EXIT
 for ((i = 0; i < ${#todo[@]}; i++)); do
     src="${todo[i]}"
     key="${src,,}"
@@ -82,11 +90,12 @@ for ((i = 0; i < ${#todo[@]}; i++)); do
     CHECKED=$((CHECKED + 1))
     CHECK_STARTED=$SECONDS
     log "  Checking [$((i + 1))/${#todo[@]}]: $src (objdump starting)"
-    if imports=$("$OBJDUMP" -p "$src" 2>&1); then
-        log "  Imports read: $src (objdump=$((SECONDS - CHECK_STARTED))s, output=${#imports} chars; resolving dependencies)"
+    if "$OBJDUMP" -p "$src" > "$IMPORT_DUMP" 2>&1; then
+        IMPORT_BYTES=$(wc -c < "$IMPORT_DUMP")
+        log "  Imports read: $src (objdump=$((SECONDS - CHECK_STARTED))s, output=$IMPORT_BYTES bytes; resolving dependencies)"
     else
         RC=$?
-        log "  ERROR: cannot inspect $src (exit=$RC, elapsed=$((SECONDS - CHECK_STARTED))s): $imports"
+        log "  ERROR: cannot inspect $src (exit=$RC, elapsed=$((SECONDS - CHECK_STARTED))s): $(cat "$IMPORT_DUMP")"
         MISSING=$((MISSING + 1))
         continue
     fi
@@ -96,7 +105,7 @@ for ((i = 0; i < ${#todo[@]}; i++)); do
     FILE_MISSING=0
     PARSE_STARTED=$SECONDS
     log "  Parsing import table: $src (awk starting)"
-    if import_list=$(awk '/DLL Name:/ {print $3}' <<< "$imports" 2>&1); then
+    if import_list=$(awk '/DLL Name:/ {print $3}' "$IMPORT_DUMP" 2>&1); then
         log "  Import table parsed: $src (elapsed=$((SECONDS - PARSE_STARTED))s, names=${#import_list} chars)"
     else
         RC=$?