EnvVarUpdate.nsh is not included in NSIS 3.05

I just installed NSIS 3.05 and tried to recompile an old nsi file we created that uses EnvVarUpdate. EnvVarUpdate.nsh isn't in nsis-3.05.zip nor was it installed from nsis-3.05-setup.exe. I can't find any documentation about it being deprecated. Where is this file?

I don't think that file was ever a part of the official installer, you must have downloaded it from the Wiki.

Use https://nsis.sourceforge.io/EnVar_plug-in instead, it is much safer.