bug#58567: Some grafts use a different input derivation than computed by --no-grafts

[zimoun]

Hi,

On dim., 16 oct. 2022 at 19:06, Marius Bakke <marius@gnu.org> wrote:

> As an example, as of commit 3d8c243efb615c7e642942433be1c7badf0ae65e,
> 'guix build -d telegram-desktop' produces:
>
>   /gnu/store/q1gx5xaszlyyr0sx663c2qkx92cqbr4r-telegram-desktop-4.2.2.drv
>
> If we open that graft derivation, we see that it depends on:
>
>   /gnu/store/92bl6qmj5r0byc59fykvlfaqmw6ikvy8-telegram-desktop-4.2.2.drv
>
> However:
>
>   $ guix build -d --no-grafts telegram-desktop
>   /gnu/store/4vbj4gblmwvl645z1q3aaxfhckjqi3kg-telegram-desktop-4.2.2.drv

--8<---------------cut here---------------start------------->8---
$ guix build 
/gnu/store/92bl6qmj5r0byc59fykvlfaqmw6ikvy8-telegram-desktop-4.2.2.drv
/gnu/store/in8b3sycbpjmy1jk8887b1siwycmm19y-telegram-desktop-4.2.2

      vs

$ guix build 
/gnu/store/4vbj4gblmwvl645z1q3aaxfhckjqi3kg-telegram-desktop-4.2.2.drv
/gnu/store/qhd9qyma22k12gbp0f0yi1389wyiai64-telegram-desktop-4.2.2
--8<---------------cut here---------------end--------------->8---

Indeed that’s an issue.  Examining,

/gnu/store/vv1f598yc17rl08059625cw61ig0c3k0-telegram-desktop-4.2.2-builder
      vs
/gnu/store/qjw2k2dzvw51rxa5k9mr7i41ql4gwr28-telegram-desktop-4.2.2-builder


the differences are,

     ("fcitx-qt5" . 
"/gnu/store/swyjasxcnlbxavpaiaginsyzr1gdpban-fcitx-qt5-1.2.6")

      vs

     ("fcitx-qt5" . 
"/gnu/store/k184g9bj05zz0lnz7j5h1zsrjavdadwp-fcitx-qt5-1.2.6")


and

   "/gnu/store/ir6lpakwwj897lbjfn4n9kmxiqxs377l-qtbase-5.15.5"

      vs

   "/gnu/store/w66rzihchl7n9d1zpr2qvgiyd58zr2pp-qtbase-5.15.5"



Cheers,
simon