Chisel is flaky when the archive is updating

[zhijie-yang]

Chisel is flaky when there are ongoing updates in the archive, and it often leads to cut failures with the following logs:

...
026-05-07 11:25:10.798 :: 2026/05/07 11:25:10 Fetching ubuntu 24.04 noble-updates suite details...
2026-05-07 11:25:10.802 :: 2026/05/07 11:25:10 Release date: Thu, 07 May 2026 10:17:06 UTC
2026-05-07 11:25:10.802 :: 2026/05/07 11:25:10 Fetching index for ubuntu 24.04 noble-updates main component...
2026-05-07 11:25:10.876 :: error: cannot fetch from archive: expected digest 9e43a1e44de6364b420cee4ed3a875d86c91c303dbe0a430e223fdfab46203c2, got 94d992c6890c67af4e8f6ceed7a8cdb501128d91a770345779e8544304fcfe35

Propose: Chisel should implement a mechanism similar to AptByHash to ensure the consistency of its cache.

[mohnabilibrahim]

I've been hitting the same issue as well:
12.48 2026/05/12 10:29:28 Fetching index for ubuntu 22.04 jammy-updates main component...
14.21 error: cannot fetch from archive: expected digest bac00d88aead4e7ddc382f82d2db26ea3c3277c208c027dfd4f825f9c612e3ea, got 8a3da10e4cf7cbfc806136a0c47991d88e45f10ee8a8288e4cfc8b001fd96e99

Any possible work-around?

[gruyaume]

Hello,

We face these issues regularly in our CI making our rockcraft builds very flaky.

rockcraft_chisel_build_log.txt

Thank you!