Some code in guix-package* is somehow reached multiple times without any clear reason?

[Evan Cooney <evancooney71@gmail.com>]

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Hello guix developers,

I was profiling each expression in guix-package* trying to find which
expression takes the most time to evaluate when I noticed the profiling
command displaying data multiple times despite wrapping an expression that
looks like it's only evaluated one time. Here is the code:
https://paste.debian.net/1334468/. I checked the definition of
call-build-hander and only invokes its thunk argument one time, so I have
no idea what's going on here. Could someone explain why this might be
happening?

Here is the output produced when installing librewolf:
https://paste.debian.net/1334470/

It's mostly profiling data, but the point is that there is more than one
report from the profiler, meaning  that it was called more than one time.

Thank you,
Evan Cooney

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