update readme

Author: ateoi

README.md

@@ -10,10 +10,12 @@ of Lua.
 
 ## Prerequisites
 
-- C compiler (Microsoft Visual C++ or Clang)
-- CMake
-- Ninja
-- WiX Toolset
+- C compiler ([Microsoft Visual
+  C++](https://learn.microsoft.com/cpp/overview/visual-cpp-in-visual-studio) or
+  [Clang](https://clang.llvm.org/))
+- [CMake](https://cmake.org/)
+- [Ninja](https://ninja-build.org/)
+- [WiX v3](https://wixtoolset.org/docs/wix3/) (if packaging on Windows)
 
 You can install the first three components with the following
 [winget](https://learn.microsoft.com/windows/package-manager/winget/) commands:
@@ -23,7 +25,36 @@ winget install --id LLVM.LLVM
 winget install --id Kitware.CMake
 winget install --id Ninja-build.Ninja
 ```
-WiX Toolset is available at <https://github.com/wixtoolset/wix3/releases/>.
+
+WiX v3 is available at <https://github.com/wixtoolset/wix3/releases/>. It
+requires .NET Framework 3.5 that can be installed with the following command:
+
+```powershell
+Start-Process `
+    -FilePath pwsh `
+    -ArgumentList "-Command `"& {Enable-WindowsOptionalFeature -Online -FeatureName NetFx3}`"" `
+    -Wait `
+    -Verb RunAs
+```
+
+Update your path environment with `setx` (supposing you installed the tools in
+their default directories):
+
+```powershell
+setx PATH ($(Get-ItemProperty -Path HKCU:\Environment -Name Path).Path + "$env:ProgramFiles\LLVM\bin;${env:ProgramFiles(x86)}\WiX Toolset v3.11\bin")
+```
+
+Check if `PATH` was set correctly:
+
+```
+Get-Command clang
+Get-Command cmake
+Get-Command ninja
+Get-Command candle
+```
+
+You may need to restart your Windows session if you can't find `ninja` even
+after restarting your terminal.
 
 ## Build
 
@@ -34,6 +65,7 @@ MSI formats:
 cmake -B build -G Ninja -D CMAKE_BUILD_TYPE=RelWithDebInfo
 cmake --build build --target package
 ```
+
 You need Internet access to execute the build process to download the Lua source
 code and LuaRocks binaries.