diff --git a/.github/workflows/dev-build.yml b/.github/workflows/dev-build.yml
index e30592c..f9fc1fa 100644
--- a/.github/workflows/dev-build.yml
+++ b/.github/workflows/dev-build.yml
@@ -556,7 +556,7 @@ jobs:
             rm -f "$zip_path"
             local attempt dll_path
             for attempt in 1 2 3; do
-              echo "📥 下载 DuckDB Windows 动态库 (${attempt}/3): ${DUCKDB_WINDOWS_LIBRARY_URL}"
+              echo "📥 下载 DuckDB Windows 动态库 (${attempt}/3): ${DUCKDB_WINDOWS_LIBRARY_URL}" >&2
               if curl --retry 3 --retry-delay 2 --retry-all-errors --connect-timeout 20 --max-time 300 -fsSL "$DUCKDB_WINDOWS_LIBRARY_URL" -o "$zip_path"; then
                 if unzip -tq "$zip_path" >/dev/null 2>&1; then
                   rm -rf "$lib_dir"
@@ -575,12 +575,12 @@ jobs:
                     echo "$lib_dir"
                     return 0
                   fi
-                  echo "⚠️ DuckDB Windows 动态库压缩包缺少 duckdb.dll，准备重试"
+                  echo "⚠️ DuckDB Windows 动态库压缩包缺少 duckdb.dll，准备重试" >&2
                 else
-                  echo "⚠️ DuckDB Windows 动态库压缩包校验失败，准备重试"
+                  echo "⚠️ DuckDB Windows 动态库压缩包校验失败，准备重试" >&2
                 fi
               else
-                echo "⚠️ DuckDB Windows 动态库下载失败，准备重试"
+                echo "⚠️ DuckDB Windows 动态库下载失败，准备重试" >&2
               fi
               rm -f "$zip_path"
               rm -rf "$lib_dir"
@@ -618,6 +618,7 @@ jobs:
               if [ -n "$DUCKDB_LIB_DIR" ]; then
                 DUCKDB_LIB_DIR_GCC="$(cygpath -m "$DUCKDB_LIB_DIR")"
                 DUCKDB_LIB_DIR_PATH="$(cygpath -u "$DUCKDB_LIB_DIR")"
+                # cgo 会把每个 CGO_LDFLAGS 片段转成 //go:cgo_ldflag，-L 参数不能再额外包引号。
                 DUCKDB_WINDOWS_CGO_LDFLAGS="-L${DUCKDB_LIB_DIR_GCC} -lduckdb -lstdc++ -lm -lws2_32 -lwsock32 -lrstrtmgr"
                 CGO_ENABLED=1 GOOS="$GOOS" GOARCH="$GOARCH" CGO_LDFLAGS="${DUCKDB_WINDOWS_CGO_LDFLAGS}" PATH="${DUCKDB_LIB_DIR_PATH}:$PATH" go build \
                   -tags "${BUILD_TAGS}" \
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 6a261e6..3afcc10 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -554,7 +554,7 @@ jobs:
             rm -f "$zip_path"
             local attempt dll_path
             for attempt in 1 2 3; do
-              echo "📥 下载 DuckDB Windows 动态库 (${attempt}/3): ${DUCKDB_WINDOWS_LIBRARY_URL}"
+              echo "📥 下载 DuckDB Windows 动态库 (${attempt}/3): ${DUCKDB_WINDOWS_LIBRARY_URL}" >&2
               if curl --retry 3 --retry-delay 2 --retry-all-errors --connect-timeout 20 --max-time 300 -fsSL "$DUCKDB_WINDOWS_LIBRARY_URL" -o "$zip_path"; then
                 if unzip -tq "$zip_path" >/dev/null 2>&1; then
                   rm -rf "$lib_dir"
@@ -573,12 +573,12 @@ jobs:
                     echo "$lib_dir"
                     return 0
                   fi
-                  echo "⚠️ DuckDB Windows 动态库压缩包缺少 duckdb.dll，准备重试"
+                  echo "⚠️ DuckDB Windows 动态库压缩包缺少 duckdb.dll，准备重试" >&2
                 else
-                  echo "⚠️ DuckDB Windows 动态库压缩包校验失败，准备重试"
+                  echo "⚠️ DuckDB Windows 动态库压缩包校验失败，准备重试" >&2
                 fi
               else
-                echo "⚠️ DuckDB Windows 动态库下载失败，准备重试"
+                echo "⚠️ DuckDB Windows 动态库下载失败，准备重试" >&2
               fi
               rm -f "$zip_path"
               rm -rf "$lib_dir"
@@ -616,6 +616,7 @@ jobs:
               if [ -n "$DUCKDB_LIB_DIR" ]; then
                 DUCKDB_LIB_DIR_GCC="$(cygpath -m "$DUCKDB_LIB_DIR")"
                 DUCKDB_LIB_DIR_PATH="$(cygpath -u "$DUCKDB_LIB_DIR")"
+                # cgo 会把每个 CGO_LDFLAGS 片段转成 //go:cgo_ldflag，-L 参数不能再额外包引号。
                 DUCKDB_WINDOWS_CGO_LDFLAGS="-L${DUCKDB_LIB_DIR_GCC} -lduckdb -lstdc++ -lm -lws2_32 -lwsock32 -lrstrtmgr"
                 CGO_ENABLED=1 GOOS="$GOOS" GOARCH="$GOARCH" CGO_LDFLAGS="${DUCKDB_WINDOWS_CGO_LDFLAGS}" PATH="${DUCKDB_LIB_DIR_PATH}:$PATH" go build \
                   -tags "${BUILD_TAGS}" \
diff --git a/internal/app/methods_driver.go b/internal/app/methods_driver.go
index 864aa11..64d01a1 100644
--- a/internal/app/methods_driver.go
+++ b/internal/app/methods_driver.go
@@ -4132,7 +4132,8 @@ func withEnvValue(env []string, key string, value string) []string {
 func duckDBWindowsDynamicLibraryCGOLDFlags(libDir string) string {
 	normalizedDir := filepath.ToSlash(strings.TrimSpace(libDir))
 	parts := []string{
-		fmt.Sprintf("-L\"%s\"", normalizedDir),
+		// cgo 会把每个 CGO_LDFLAGS 片段转成 //go:cgo_ldflag，带引号的 -L 在 windows/amd64 上会被当成非法参数。
+		fmt.Sprintf("-L%s", normalizedDir),
 		"-lduckdb",
 		"-lstdc++",
 		"-lm",
diff --git a/internal/app/methods_driver_version_test.go b/internal/app/methods_driver_version_test.go
index d27d8ae..e7764b9 100644
--- a/internal/app/methods_driver_version_test.go
+++ b/internal/app/methods_driver_version_test.go
@@ -430,7 +430,7 @@ func TestDuckDBWindowsBuildUsesDynamicLibraryTag(t *testing.T) {
 func TestDuckDBWindowsDynamicLibraryCGOLDFlagsIncludeSupportLibraries(t *testing.T) {
 	flags := duckDBWindowsDynamicLibraryCGOLDFlags(`C:\tmp\duckdb lib`)
 	for _, expected := range []string{
-		`-L"C:/tmp/duckdb lib"`,
+		`-LC:/tmp/duckdb lib`,
 		"-lduckdb",
 		"-lstdc++",
 		"-lm",