Re: install.bat in windows-arm64 not working

On 4/8/2026 7:21 PM, Thomas Welter wrote:
> Sorry for the late response; I also do not really use the arm laptop, but I was testing my IDE and stumbled upon the error.
> I investigated a little further:
> 
> The output of your command inspect(os.uname()) is:
> table={
>   ["machine"]="arm64",
>   ["nodename"]="LAPTOP-93YX-KB0",
>   ["release"]="",
>   ["sysname"]="Windows",
>   ["version"]="",
> }
> 
> So the (using my workaround) installed distribution correctly detects itself as arm64 and the install.bat script does this too, as:
> echo %PROCESSOR_ARCHITECTURE% returns ARM64
> and
> echo %PLATFORM% returns windows-arm64
> 
> I opened the extracted installer zip folder as a VS Code workspace and let Github Copilot analyse the files. His response:
> -----
> In mtxrun.lua (line 4058), the platform detection for Windows ARM64 sets:
>     bits, platform = 64, "windows-arm64"
> So os.platform becomes "windows-arm64".
> In mtx-install.lua (line 477), the lookup:
>     local osplatform = environment.arguments.platform or nil         -- nil (no --platform arg passed)
>     local platform   = platforms[osplatform or os.platform or ""]   -- platforms["windows-arm64"]
> The problem: The platforms table in mtx-install.lua:106 has entries for "win64", "mswin", "windows" etc., but "windows-arm64" is missing. So the lookup returns nil.
> On your x86-64 machine os.platform is "win64", which exists in the table — that's why it works there.
> -----
> And indeed, by adding the line
> ["windows-arm64"]  = "windows-arm64",
> to the platforms table, the installer works (output: mtx-install     | platform : windows-arm64). I guess the entry was just forgotten to put in.. But I am quite confused that I am the first to notice this, as these days there are many windows arm devices around..
> 
> So I guess that was the issue and adding the platform table entry is the solution?

Indeed, good catch! I'll add it to that table.

Hans

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