ghc-stage1 wrapper can read package environment

A concerned user reports to me through the responsible disclosure channels:

Matthew

I'm stuck here:

./_build/ghc-stage1 --show-iface _build/stage1/libraries/base/build/GHC/Real.hi >& real-hi

I want to see the .hi file from a particular library.  That's the right way to invoke ghc-stage1, right?  But I get

Loaded package environment from /home/simonpj/.ghc/x86_64-linux-9.5.20220628/environments/default
<command line>: cannot satisfy -package-id base-4.17.0.0

The issue is the ghc-stage1 wrapper shouldn't look at the environment file.

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