From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Craven <david@craven.ch>
Subject: bug#22990: Grafts leads to inefficient substitute info retrieval
Date: Wed, 11 Jan 2017 11:51:29 +0100
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To: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@gnu.org>
Cc: 22990@debbugs.gnu.org

> On second thought, the whole idea of applying grafts on the final result
> (instead of applying grafts at each step like we do now) doesn=E2=80=99t =
fly.
> It works well for things like a profile or the system derivation, but
> breaks for less trivial things.

> For example, if you=E2=80=99re building a VM image or a binary tarball, y=
ou
> really need to graft packages early on; trying to graft the VM image or
> binary tarball wouldn=E2=80=99t have the desired effect.

Isn't a system derivation or a profile derivation an intermediate step
to these derivations? Can't there be a flag or something called
#:already-grafted? #t?