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  • Quoting from the manual:

     

    $INSTALLER_TEMP_DIR$ The path to a temp directory for use by an installer. This will be deleted when its use is completed, assuming no items are in use. This variable is read-only.

     

    Therefore you cannot change the value of this variable.
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  • If you're interested on Windows only I think that the answer is yes, I mean on all the Windows build systems I've got these two user variables for the account that does the build:TEMP & TMP they both have the value %USERPROFILE%\Local Settings\Temp

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How to set $INSTALLER_TEMP_DIR$