diff --git a/local-tool/scripts/bootstrap-windows.ps1 b/local-tool/scripts/bootstrap-windows.ps1
index c3a7888..15b371a 100644
--- a/local-tool/scripts/bootstrap-windows.ps1
+++ b/local-tool/scripts/bootstrap-windows.ps1
@@ -104,6 +104,24 @@ function Convert-ToMsysPath($winPath) {
 }
 $msysPython = Convert-ToMsysPath $realPython
 
+# 找 Inno Setup Compiler (iscc.exe)，winget 裝在 Program Files (x86) 不在 PATH 裡
+$isccCandidates = @(
+    "${env:ProgramFiles(x86)}\Inno Setup 6\iscc.exe",
+    "$env:ProgramFiles\Inno Setup 6\iscc.exe",
+    "${env:ProgramFiles(x86)}\Inno Setup 5\iscc.exe"
+)
+$isccPath = $null
+foreach ($p in $isccCandidates) {
+    if ($p -and (Test-Path $p)) { $isccPath = $p; break }
+}
+if ($isccPath) {
+    Log "偵測到 Inno Setup: $isccPath"
+    $msysIsccDir = Convert-ToMsysPath (Split-Path $isccPath -Parent)
+} else {
+    Log 'WARN: 找不到 Inno Setup（iscc.exe），make exe 步驟會失敗'
+    $msysIsccDir = $null
+}
+
 # Makefile 需要 bash + make，透過 MSYS2 bash 執行
 # 將 Windows 路徑 C:\foo\bar 轉成 MSYS2 路徑 /c/foo/bar
 $projectPath = (Get-Location).Path
@@ -113,10 +131,13 @@ $msysPath = '/' + $projectPath.Substring(0,1).ToLower() + '/' + `
 $bashParts = @(
     "cd '$msysPath'",
     'export VISIONA_ALLOW_GPL_FFMPEG=1',
-    "export VISIONA_PYTHON='$msysPython'",
-    'make vendor-python-windows vendor-wheels-windows vendor-ffmpeg-windows vendor-ytdlp-windows',
-    'make payload-windows'
+    "export VISIONA_PYTHON='$msysPython'"
 )
+if ($msysIsccDir) {
+    $bashParts += "export PATH=`"$msysIsccDir`":`$PATH"
+}
+$bashParts += 'make vendor-python-windows vendor-wheels-windows vendor-ffmpeg-windows vendor-ytdlp-windows'
+$bashParts += 'make payload-windows'
 
 switch ($Target) {
     'payload-windows' { }