Code change:
<del> // ---------------------------------------------------------------------------- // // Inno Setup Ver:	5.4.2 // Script Version:	1.4.1 // Author:			Jared Breland <jbreland@legroom.net> // Homepage:		http://www.legroom.net/software // License:			GNU Lesser General Public License (LGPL), version 3 //						http://www.gnu.org/licenses/lgpl.html // // Script Function: //	Allow modification of environmental path directly from Inno Setup installers // // Instructions: //	Copy modpath.iss to the same directory as your setup script // //	Add this statement to your [Setup] section //		ChangesEnvironment=true // //	Add this statement to your [Tasks] section //	You can change the Description or Flags //	You can change the Name, but it must match the ModPathName setting below //		Name: modifypath; Description: &Add application directory to your environmental path; Flags: unchecked // //	Add the following to the end of your [Code] section //	ModPathName defines the name of the task defined above //	ModPathType defines whether the 'user' or 'system' path will be modified; //		this will default to user if anything other than system is set //	setArrayLength must specify the total number of dirs to be added //	Result[0] contains first directory, Result[1] contains second, etc. //		const //			ModPathName = 'modifypath'; //			ModPathType = 'user'; // //		function ModPathDir(): TArrayOfString; //		begin //			setArrayLength(Result, 1); //			Result[0] := ExpandConstant('{app}'); //		end; //		#include "modpath.iss" // ---------------------------------------------------------------------------- procedure ModPath(); var oldpath:	String; newpath:	String; updatepath:	Boolean; pathArr:	TArrayOfString; aExecFile:	String; aExecArr:	TArrayOfString; i, d:		Integer; pathdir:	TArrayOfString; regroot:	Integer; regpath:	String; begin // Get constants from main script and adjust behavior accordingly // ModPathType MUST be 'system' or 'user'; force 'user' if invalid if ModPathType = 'system' then begin regroot := HKEY_LOCAL_MACHINE; regpath := 'SYSTEMCurrentControlSetControlSession ManagerEnvironment'; end else begin regroot := HKEY_CURRENT_USER; regpath := 'Environment'; end; // Get array of new directories and act on each individually pathdir := ModPathDir(); for d := 0 to GetArrayLength(pathdir)-1 do begin updatepath := true; // Modify WinNT path if UsingWinNT() = true then begin // Get current path, split into an array RegQueryStringValue(regroot, regpath, 'Path', oldpath); oldpath := oldpath + ';'; i := 0; while (Pos(';', oldpath) > 0) do begin SetArrayLength(pathArr, i+1); pathArr[i] := Copy(oldpath, 0, Pos(';', oldpath)-1); oldpath := Copy(oldpath, Pos(';', oldpath)+1, Length(oldpath)); i := i + 1; // Check if current directory matches app dir if pathdir[d] = pathArr[i-1] then begin // if uninstalling, remove dir from path if IsUninstaller() = true then begin continue; // if installing, flag that dir already exists in path end else begin updatepath := false; end; end; // Add current directory to new path if i = 1 then begin newpath := pathArr[i-1]; end else begin newpath := newpath + ';' + pathArr[i-1]; end; end; // Append app dir to path if not already included if (IsUninstaller() = false) AND (updatepath = true) then newpath := newpath + ';' + pathdir[d]; // Write new path RegWriteStringValue(regroot, regpath, 'Path', newpath); // Modify Win9x path end else begin // Convert to shortened dirname pathdir[d] := GetShortName(pathdir[d]); // If autoexec.bat exists, check if app dir already exists in path aExecFile := 'C:AUTOEXEC.BAT'; if FileExists(aExecFile) then begin LoadStringsFromFile(aExecFile, aExecArr); for i := 0 to GetArrayLength(aExecArr)-1 do begin if IsUninstaller() = false then begin // If app dir already exists while installing, skip add if (Pos(pathdir[d], aExecArr[i]) > 0) then updatepath := false; break; end else begin // If app dir exists and = what we originally set, then delete at uninstall if aExecArr[i] = 'SET PATH=%PATH%;' + pathdir[d] then aExecArr[i] := ''; end; end; end; // If app dir not found, or autoexec.bat didn't exist, then (create and) append to current path if (IsUninstaller() = false) AND (updatepath = true) then begin SaveStringToFile(aExecFile, #13#10 + 'SET PATH=%PATH%;' + pathdir[d], True); // If uninstalling, write the full autoexec out end else begin SaveStringsToFile(aExecFile, aExecArr, False); end; end; end; end; // Split a string into an array using passed delimiter procedure Explode(var Dest: TArrayOfString; Text: String; Separator: String); var i: Integer; begin i := 0; repeat SetArrayLength(Dest, i+1); if Pos(Separator,Text) > 0 then	begin Dest[i] := Copy(Text, 1, Pos(Separator, Text)-1); Text := Copy(Text, Pos(Separator,Text) + Length(Separator), Length(Text)); i := i + 1; end else begin Dest[i] := Text; Text := ''; end; until Length(Text)=0; end; procedure ModPathCurStepChanged(CurStep: TSetupStep); var taskname:	String; begin taskname := ModPathName; if CurStep = ssPostInstall then if IsTaskSelected(taskname) then ModPath(); end; procedure CurUninstallStepChanged(CurUninstallStep: TUninstallStep); var aSelectedTasks:	TArrayOfString; i:				Integer; taskname:		String; regpath:		String; regstring:		String; appid:			String; begin // only run during actual uninstall if CurUninstallStep = usUninstall then begin // get list of selected tasks saved in registry at install time appid := '{#emit SetupSetting("AppId")}'; if appid = '' then appid := '{#emit SetupSetting("AppName")}'; regpath := ExpandConstant('SoftwareMicrosoftWindowsCurrentVersionUninstall'+appid+'_is1'); RegQueryStringValue(HKLM, regpath, 'Inno Setup: Selected Tasks', regstring); if regstring = '' then RegQueryStringValue(HKCU, regpath, 'Inno Setup: Selected Tasks', regstring); // check each task; if matches modpath taskname, trigger patch removal if regstring <> '' then begin taskname := ModPathName; Explode(aSelectedTasks, regstring, ','); if GetArrayLength(aSelectedTasks) > 0 then begin for i := 0 to GetArrayLength(aSelectedTasks)-1 do begin if comparetext(aSelectedTasks[i], taskname) = 0 then ModPath(); end; end; end; end; end; function NeedRestart(): Boolean; var taskname:	String; begin taskname := ModPathName; if IsTaskSelected(taskname) and not UsingWinNT() then begin Result := True; end else begin Result := False; end; end; </del>

Related discussion:
text: I don't have access to windows at the moment to check if this bug has been resolved, but it's been a long time...
Grabbing the Windows download link from and swapping the for yields a functional link to the , which is nice. Testing on win7-x64, the MSI extracts with lessmsi, but the directory structure is somewhat unusual so there's no one-liner to get the Rust folder out. The best I came up with was: This yields a Rust install rooted at . However now that exists, multiple targets aren't really an issue anymore. Someone should make a Chocolatey package for
Can someone with access to Windows check what happens here today?
The latest version installs to instead, which works, but is a terrible default.
Triage: ! This seems... fine. I'm not sure if this should stay open or not; I'll let the relevant team (infra? compiler?) decide.