Hi everyone,

Edouard Klein <edou@rdklein.fr> writes:

> I think my misunderstanding boils down to a bad mental model of how guix
> works.
>
> What I imagine the "Computing guix derivation" step to be is no
> different than building a package whose inputs are the channels'
> sources, guile, and the current guix, and whose output is the new guix.
>
> Simon and Richard pointed out that the combinatorial combination of all
> possible input combination makes this hard to substitute, but I don't
> understand how its result, once in the store, can't lead to a simple
> linking from the profile to the store, instead of re-running the
> "Computing guix derivation" step when guix pull is called with the same
> inputs.
>
> Surely my mental model is wrong somehow ?

You might be interested in this thread [1], which tries to explain the
terrible performance of `guix pull`.

[1] mid:87wmxe3vsa.fsf@jpoiret.xyz
    https://yhetil.org/guix/87wmxe3vsa.fsf@jpoiret.xyz/

Best,
-- 
Josselin Poiret