From e0c10a16d924a8e8c567d851e69a0f27ac9486fb Mon Sep 17 00:00:00 2001
From: Aztec Bot <49558828+AztecBot@users.noreply.github.com>
Date: Thu, 9 Jul 2026 04:59:18 -0400
Subject: [PATCH] fix(sol): use pinned compiler for bb sol build (#24624)
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## Summary
- Backport the Foundry config fix from
[#24620](https://github.com/AztecProtocol/aztec-packages/pull/24620) to
`merge-train/spartan`.
- Move the `barretenberg/sol` `solc` setting into `[profile.default]` so
Foundry actually uses `../../l1-contracts/solc-0.8.30`.

## Why
[#24620](https://github.com/AztecProtocol/aztec-packages/pull/24620)
fixed the v5 train after `bb-sol` ignored the intended pinned compiler
and fell back to Foundry's SVM download path. `merge-train/spartan` had
the same TOML scoping issue.

## Verification
- `forge config --json` in `barretenberg/sol` reports `"solc":
"../../l1-contracts/solc-0.8.30"`.
- `make bb-sol` passed.

---
*Created by
[claudebox](https://claudebox.work/v2/sessions/2b8c305bd7244e7e) ·
group: `slackbot`*
---
 barretenberg/sol/foundry.toml | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/barretenberg/sol/foundry.toml b/barretenberg/sol/foundry.toml
index a0ed4ad08f3c..54c16203d2fb 100644
--- a/barretenberg/sol/foundry.toml
+++ b/barretenberg/sol/foundry.toml
@@ -9,14 +9,14 @@ gas_limit = 900000000000000000
 bytecode_hash = "none"
 evm_version = "cancun"
 
-[fuzz]
-runs = 2
-
 # Use the pre-downloaded solc binary from l1-contracts. l1-contracts' build is
 # the single owner of the svm download; pointing other forge projects at the
 # same binary avoids parallel svm downloads racing on ~/.svm.
 solc = "../../l1-contracts/solc-0.8.30"
 
+[fuzz]
+runs = 2
+
 [lint]
 ignore = ["./lib/**"]
 exclude_lints = [