## What changed
Set `persist-credentials: false` for the V8 canary repository checkout and
for the `rusty_v8` checkouts in both the canary and release workflows.
GitOrigin-RevId: b4ccca7c7edf4e038b7b84c83f83d1416f655f65
## Why
Checking only the pull request head can miss conflicts with changes already on
`main`.
## What changed
Remove explicit pull request head refs from required workflow checkouts so
GitHub Actions checks out the synthetic merge commit by default. Keep the
blocking gate on the same combined revision as the child workflows it
evaluates, and document the merge-commit policy in the workflow README.
GitOrigin-RevId: dc357caa5dc43f46b9b9a0edea6ee560b4fe8efb
## Why
Windows Cargo and Bazel jobs spend significant time in filesystem-heavy
build and cache directories. Route those directories through one CI
build root so Windows can use its Dev Drive and Unix can use a stable
cache root.
## What
- Have `setup-ci` define `CI_BUILD_ROOT`, `CARGO_TARGET_DIR`, Bazel
cache/output paths, and temp paths.
- Require Windows to find or provision a verified Dev Drive instead of
falling back to `C:`.
- Pass the shared Bazel output base to `setup-bazel` so its explicit
`output_base` does not defeat Dev Drive routing.
- Point nextest, release, and V8 source-build paths at the shared
environment contract.
## Benchmark results
One-off cold-cache WPR/ETW traces show the explicit Bazel output-base
routing removes the dominant `C:` traffic:
| sample | `C:\_bazel` | summed `C:` traffic | traced test step |
|---|---:|---:|---:|
| shard 1 before | 62.2 GiB | 85.2 GiB | 16m22s |
| shard 1 updated | 0 | 16.5 GiB | 12m05s |
| shard 3 before | 67.2 GiB | 84.6 GiB | 16m48s |
| shard 3 updated | 0 | 13.5 GiB | 11m08s |
For a cold x64 V8 source build, the retained build-tail sample showed
`D:\cargo-target` at ~1.29 GiB while measured `C:` roots totaled ~0.45
GiB (`C:\Users` ~0.33 GiB, `C:\Program Files` ~0.06 GiB, `C:\Windows`
~0.03 GiB). The full cold build took 2h20m36s.
The Bazel timing improvement is directional because both refreshed
shards failed tests. The V8 trace is a bounded build-tail sample, not
the full build. All final samples had zero lost ETW events; VHDX traffic
was excluded from the optimization ranking.
Runs: [baseline
Bazel](https://github.com/openai/codex/actions/runs/28911908527),
[updated
Bazel](https://github.com/openai/codex/actions/runs/28917133701), [V8
build tail](https://github.com/openai/codex/actions/runs/28933626678).
## Manual validation
- Ran `just fmt`.
- Ran `just test-github-scripts` (35 tests).
- Parsed GitHub Actions YAML with `yq`.
- Ran `git diff --check`.
## Stack
- [#31332](https://github.com/openai/codex/pull/31332) — parameterize
Cargo target paths
- [#31356](https://github.com/openai/codex/pull/31356) — Windows 2025
runner bump
- [#31357](https://github.com/openai/codex/pull/31357) — Dev Drive I/O
routing
## Why
The V8 Windows source jobs need a runner image that can support the
later Dev Drive setup.
## What
Move the two V8 Windows source-build matrix entries from `windows-2022`
to `windows-2025`.
Namespace the canary source-build cache by runner image so it cannot
restore Windows 2022 native outputs.
## Manual validation
- Ran `just fmt`.
- Ran `just test-github-scripts` (33 tests).
- Parsed GitHub Actions YAML with `yq`.
- Ran `git diff --check`.
## Stack
- [#31332](https://github.com/openai/codex/pull/31332) — parameterize
Cargo target paths
- [#31356](https://github.com/openai/codex/pull/31356) — Windows 2025
runner bump
- [#31357](https://github.com/openai/codex/pull/31357) — Dev Drive I/O
routing
## Why
Prepare CI jobs for a later build-output relocation without changing
where they write today.
## What
- Export `CARGO_TARGET_DIR` from `setup-ci` at the existing
`codex-rs/target` path.
- Route nextest, release, artifact, and signing paths through
`CARGO_TARGET_DIR`.
- Require V8 staging callers to pass an explicit target directory while
preserving the existing upstream path.
## Manual validation
- Ran `just test-github-scripts`.
- Parsed GitHub Actions YAML with `yq`.
## Stack
- [#31332](https://github.com/openai/codex/pull/31332) — parameterize
Cargo target paths
- [#31356](https://github.com/openai/codex/pull/31356) — Windows 2025
runner bump
- [#31357](https://github.com/openai/codex/pull/31357) — Dev Drive I/O
routing
## Why
CI jobs repeat common bootstrap steps, which makes it harder to keep
Bazel and Cargo lanes aligned. Centralizing the lightweight setup gives
us one place for future runner-wide optimizations without adding Rust
toolchain or component installation to the Windows Bazel long poles.
## What
- add zero-input `.github/actions/setup-ci` to set Cargo's git
transport, install DotSlash and `just`, expose DotSlash from stable PATH
locations, and enable Windows Git long paths
- have `setup-bazel-ci` compose the common setup, then remove its
DotSlash/test-prerequisite plumbing
- migrate Bazel, Cargo CI, V8 canary, repo checks, nextest, and Windows
release call sites while keeping Rust toolchain and MSVC setup explicit
- preserve the existing nextest Dev Drive setup unchanged
## Validation
- `just test-github-scripts` (30 tests)
- parsed workflow and composite-action YAML with `yq`
## Why
It's hard to change the set of required jobs when they're managed in the
GitHub UI, and when each workflow is responsible for choosing it's own
scheduling it's easy to end up with skew between what we enforce on PRs
vs. on main.
## What
- add a `blocking-ci` caller workflow, triggered by pull requests and
pushes to `main`, for Bazel, blob size, cargo-deny, Codespell,
`repo-checks`, rust CI, and SDK CI
- add an `always()` terminal job named `CI required` that fails unless
every called workflow succeeds
- add a `postmerge-ci` caller workflow for `rust-ci-full` and
`v8-canary`, with a terminal `Postmerge CI results` job
- centralize V8 relevance detection in `v8_canary_changes.py`; unrelated
PR and postmerge runs execute metadata only and skip the expensive build
matrices
- leave `v8-canary` outside the blocking gate and leave the external
`cla` check independent
## Rollout
A repository admin must replace the existing required GitHub Actions
contexts with `CI required` in the main-branch ruleset. Retain `cla` as
a separate required check. Until that change is coordinated, this PR
cannot satisfy the old standalone check names. In-flight PRs will need
to be rebased after this lands.
## Why
CI jobs should not silently leave tracked changes or untracked files in
the repository worktree.
## What
- Add a shared final worktree-cleanliness action to 19 checkout-bearing
PR and main CI jobs.
- Ignore the intentional SDK scratch directory and nested V8 checkout.
- Pin Bazelisk in shared CI setup so `.bazelversion` remains
authoritative, avoiding `MODULE.bazel.lock` deltas on Windows runners.
- Leave `rust-ci-full` and release-only workflows unchanged.
- Update `AGENTS.md` to discourage review bots from asking for
`MODULE.bazel.lock` changes.
Avoid rebuilding sandboxed Windows MSVC V8 artifacts for unrelated
changes to `codex-rs/Cargo.toml`.
The V8 canary now compares the resolved V8 version between the base and
head commits and only runs the Windows source-build matrix when:
- the resolved V8 crate version changes;
- Windows artifact-production scripts or workflows change; or
- the workflow is manually dispatched.
The existing Bazel V8 matrix is unchanged.
## Why
The Windows MSVC source builds take roughly two to three hours and
currently run whenever any entry in the broad `v8-canary` path filter
changes.
## Why
`BUILDBUDDY_API_KEY` now lives in the `bazel` GitHub Actions environment
as an environment secret. Jobs that need BuildBuddy credentials must opt
into that environment so `${{ secrets.BUILDBUDDY_API_KEY }}` resolves
from the protected environment secret instead of relying on an unscoped
repository/organization secret.
This follows the same environment-secret migration pattern as #26466.
## What Changed
- Attach each workflow job that reads `BUILDBUDDY_API_KEY` to the
`bazel` environment.
- Set `deployment: false` on those job-level environment blocks.
`deployment: false` lets the job enter the `bazel` environment to access
its environment secrets without creating GitHub deployment records for
these CI jobs. That keeps the environment as a secret/access-control
boundary without making ordinary Bazel CI runs look like deploys.
## Validation
- Parsed the modified workflow YAML files with Ruby's YAML parser.
- Checked the modified workflow files for trailing whitespace.
## Why
PR #25905 intentionally adds a failing `codex-core` unit test, but its
[Bazel test on Windows
check](https://github.com/openai/codex/actions/runs/26837526950/job/79135369259)
passed. That shows the Bazel configuration introduced by #25156 is not
behaving as expected, so revert it while the configuration can be
investigated separately.
## What changed
Revert #25156 in full, restoring the previous Bazel remote
configuration, CI scripts, workflows, `rusty_v8` handling, and
documentation. This removes the shared BuildBuddy wrapper and its tests.
## Validation
Not run locally; this exact revert was prioritized for a fast rollback.
## Why
Bazel remote configuration was selected in several CI scripts and
workflow steps. That made the BuildBuddy tenant policy easy to duplicate
and harder to audit, especially for fork pull requests that must not use
the OpenAI tenant.
This builds on
[sluongng/buildbuddy-ci-host-routing](https://github.com/openai/codex/compare/main...sluongng:codex:sluongng/buildbuddy-ci-host-routing)
and consolidates the policy in one place.
## What to do if this breaks you
See `codex-rs/docs/bazel.md` for details. TLDR:
1. make a BuildBuddy API key and put it in `~/.bazelrc`
2. if you're an OpenAI employee, add `common
--config=buildbuddy-openai-rbe` to `user.bazelrc` in the repo root
Run `just bazel-test` to ensure it works.
Note that `just bazel-remote-test` no longer exists, you need to select
a remote configuration as documented to use RBE.
## What changed
- Add `.github/scripts/run_bazel_with_buildbuddy.py` as the shared Bazel
wrapper and Python library. It selects the OpenAI host only for trusted
upstream GitHub Actions runs, routes keyed fork runs to the generic
host, and falls back to local Bazel execution when no key is available.
- Move endpoint selection into explicit `.bazelrc` configurations and
update Bazel CI, query helpers, and `rusty_v8` staging to use the shared
policy. Loading-phase target-discovery queries remain local.
- Add wrapper and `rusty_v8` unit coverage, plus `just test-scripts` for
the `.github/scripts` Python tests.
- Document local Bazel usage, `user.bazelrc` setup, BuildBuddy
configurations, and CI behavior in `codex-rs/docs/bazel.md`.
## Validation
- `just test-scripts`
- `bash -n .github/scripts/run-bazel-ci.sh
.github/scripts/run-bazel-query-ci.sh
.github/scripts/run-argument-comment-lint-bazel.sh
scripts/list-bazel-clippy-targets.sh`
- `python3 -m py_compile .github/scripts/run_bazel_with_buildbuddy.py
.github/scripts/test_run_bazel_with_buildbuddy.py
.github/scripts/test_rusty_v8_bazel.py
.github/scripts/rusty_v8_bazel.py`
- `ruff check .github/scripts/run_bazel_with_buildbuddy.py
.github/scripts/test_run_bazel_with_buildbuddy.py
.github/scripts/test_rusty_v8_bazel.py
.github/scripts/rusty_v8_bazel.py`
## Why
Cargo's libgit2 transport has intermittently failed while fetching git
dependencies with nested submodules.
[#25644](https://github.com/openai/codex/pull/25644) applied
`CARGO_NET_GIT_FETCH_WITH_CLI=true` to the main Rust release build after
macOS SecureTransport/libgit2 failures while cloning `libwebrtc`'s
nested `libyuv` submodule. Similar flakes can affect other Cargo-bearing
Rust jobs.
## What changed
Configure `CARGO_NET_GIT_FETCH_WITH_CLI=true` at workflow scope for the
remaining Cargo-bearing Rust workflows:
- fast Rust CI and `cargo-deny`
- reusable Windows and argument-comment-lint release workflows
- `rusty-v8-release` and `v8-canary` Cargo builds and smoke tests
The full Rust CI, reusable nextest workflow, and primary Rust release
build already had the override. Bazel-only workflows are unchanged
because they use a different dependency fetch path.
## Validation
- Parsed all `.github/workflows/*.yml` files as YAML.
- Scanned Cargo-bearing workflows to confirm they configure
`CARGO_NET_GIT_FETCH_WITH_CLI`.
## Summary
- Bump the workspace Rust toolchain from `1.93.0` to `1.95.0` across
Cargo, Bazel, CI, release workflows, devcontainers, and the Codex
environment config.
- Refresh `MODULE.bazel.lock` so the Bazel Rust toolchain artifacts
match the new version.
- Leave purpose-specific toolchains unchanged, including the
`argument-comment-lint` nightly and the upstream `rusty_v8` `1.91.0`
build pin.
- Includes fixes for new lints from `just fix` and a few codex-authored
fixes for lints without a suggestion.
## Summary
Move the rusty_v8 artifact production into hermetic Bazel path and bump
the `v8` crate to `147.4.0`
The new flow builds V8 release artifacts from source for Darwin and
Linux targets, publishes both the current release-compatible artifacts
and sandbox-enabled variants, and keeps Cargo consumers on prebuilt
binaries by continuing to feed the `v8` crate the archive and generated
binding files it already expects.
## Why
We need control over V8 build-time features without giving up prebuilt
artifacts for downstream Cargo builds.
Upstream `rusty_v8` already supports source-only features such as
`v8_enable_sandbox`, but its normal prebuilt release assets do not cover
every feature combination we need. Building the artifacts ourselves lets
us enable settings such as the V8 sandbox and pointer compression at
artifact build time, then publish those outputs so ordinary Cargo builds
can still consume prebuilts instead of compiling V8 locally.
This keeps the fast consumer experience of prebuilt `rusty_v8` archives
while giving us a reproducible path to ship featureful variants that
upstream does not currently publish for us.
## Implementation Notes
The Bazel graph in this PR is not copied wholesale from `rusty_v8`;
`rusty_v8`'s normal source build is still GN/Ninja-based.
Instead, this change starts from upstream V8's Bazel rules and adapts
them to Codex's hermetic toolchains and dependency layout. Where we
intentionally follow `rusty_v8`, we mirror its existing artifact
contract:
- the same `v8` crate version and generated binding expectations
- the same sandbox feature relationship, where sandboxing requires
pointer compression
- the same custom libc++ model expected by Cargo's default
`use_custom_libcxx` feature
- the same release-style archive plus `src_binding` outputs consumed by
the `v8` crate
To preserve that contract, the Bazel release path pins the libc++,
libc++abi, and llvm-libc revisions used by `rusty_v8 v147.4.0`, builds
release artifacts with `--config=rusty-v8-upstream-libcxx`, and folds
the matching runtime objects into the final static archive.
## Windows
Windows is annoyingly handled differently.
Codex's current hermetic Bazel Windows C++ platform is `windows-gnullvm`
/ `x86_64-w64-windows-gnu`, while upstream `rusty_v8` publishes Windows
prebuilts for `*-pc-windows-msvc`. Those are different ABIs, so the
Bazel graph cannot truthfully reproduce the upstream MSVC artifacts
until we add a real MSVC-targeting C++ toolchain.
For now:
- Windows MSVC consumers continue to use upstream `rusty_v8` release
archives.
- Windows GNU targets are built in-tree so they link against a matching
GNU ABI.
- The canary workflow separately exercises upstream `rusty_v8` source
builds for MSVC sandbox artifacts, but MSVC is not yet part of the
Bazel-produced release matrix.
## Validation
This PR is technically self validating through CI. I have already
published it as a release tag so the artifacts from this branch are
published to
https://github.com/openai/codex/releases/tag/rusty-v8-v147.4.0 CI for
this PR should therefore consume our own release targets. I have also
locally tested for linux and darwin.
---------
Co-authored-by: Codex <noreply@openai.com>
## Why
PR CI should test the exact commit that was pushed to the PR branch. By
default, GitHub's `pull_request` event checks out a synthetic merge
commit from `refs/pull/<number>/merge`, so the tested tree can include
an implicit merge with the current base branch instead of matching the
pushed head SHA.
Using the PR head SHA makes each check result correspond to a concrete
commit the author submitted. This also behaves better for stacked PR
workflows, including Sapling stacks and other Git stack tooling: a
middle PR's head commit already contains the lower stack changes in its
tree, without pulling in commits above it or GitHub's temporary merge
ref.
## What Changed
- Set every `actions/checkout` in `pull_request` workflows under
`.github/workflows` to use `github.event.pull_request.head.sha` on PR
events and `github.sha` otherwise.
- Updated `blob-size-policy` to compare
`github.event.pull_request.base.sha` and
`github.event.pull_request.head.sha`, since it no longer checks out
GitHub's merge commit where `HEAD^1`/`HEAD^2` represented the PR range.
## Verification
- Parsed the edited workflow YAML files with Ruby.
- Checked that every checkout block in the `pull_request` workflows has
the PR-head `ref`.
This does two things:
- We use `persist-credentials: false` everywhere now. This is
unfortunately not the default in GitHub Actions, but it prevents
`actions/checkout` from dropping `secrets.GITHUB_TOKEN` onto disk.
- We interpose (some) template expansions through environment variables.
I've limited this to contexts that have non-fixed values; contexts that
are fixed (like `*.result`) are not dangerous to expand directly inline
(but maybe we should clean those up in the future for consistency
anyways).
This is a medium-risk change in terms of CI breakage: I did a scan for
usage of `git push` and other commands that implicitly use the persisted
credential, but couldn't find any. Even still, some implicit usages of
the persisted credentials may be lurking. Please ping ww@ if any issues
arise.
This builds on top of https://github.com/openai/codex/pull/15828 by
ensuring that hash-pinned actions with version comments are fully
qualified, rather than referencing floating/mutable comments like "v7".
This makes actions management tools behave more consistently.
This shouldn't break anything, since it's comment only. But if it does,
ping ww@ 🙂
## Summary
This is the first PR in the V8 in-process sandboxing rollout.
It adds the build-system and Rust feature plumbing needed to support
sandboxed V8 builds, then enables sandboxing by default for the
source-built Bazel V8 path that we control directly. It deliberately
keeps the published `rusty_v8` artifact workflows on their current
non-sandboxed contract so this PR can land and ship independently before
we change any released artifacts.
## Rollout plan
- [x] **PR 1: land sandbox plumbing and default source-built Bazel V8 to
sandboxed mode**
- [ ] **PR 2: publish sandbox-enabled release artifacts and add
compatibility validation**
- Produce sandboxed artifact pairs for every released Cargo target that
does not already use the source-built Bazel path.
- Add CI coverage that consumes those sandboxed artifacts and verifies:
- `codex-v8-poc` reports sandbox enabled
- `codex-code-mode` builds/tests against the sandboxed path
- [ ] **PR 3: switch release consumers to sandboxed artifacts by
default**
- Update released artifact selectors/checksums.
- Enable the Rust `v8_enable_sandbox` feature in the default release
path.
- Make the sandboxed artifact family the normal path for published
builds.
- [ ] **PR 4: remove rollout-only compatibility paths**
- Remove the temporary non-sandbox release compatibility config once the
new default has shipped and baked.
- Keep the invariant tests permanently.
## Why
All Bazel CI jobs are currently blocked in the `setup-bazelisk` step
while trying to download Bazelisk.
[`bazelbuild/setup-bazelisk`](https://github.com/bazelbuild/setup-bazelisk)
is archived, and its README now recommends migrating to
[`bazel-contrib/setup-bazel`](https://github.com/bazel-contrib/setup-bazel),
so leaving our workflows on the archived action leaves CI exposed to
exactly this sort of outage.
Because `v8-canary` now consumes the shared local `setup-bazel-ci`
action, that workflow also needs to trigger when the action changes.
Without that follow-up, Bazel bootstrap regressions specific to the V8
canary path could be skipped by the workflow path filters.
## What Changed
- Switched `.github/actions/setup-bazel-ci/action.yml` from
`bazelbuild/setup-bazelisk` to `bazel-contrib/setup-bazel`, pinned to
`0.19.0`.
- Left `bazelisk-version` unset so GitHub-hosted runners can use their
preinstalled Bazelisk instead of downloading `1.x` at job start.
- Updated `.github/workflows/rusty-v8-release.yml` and
`.github/workflows/v8-canary.yml` to use the shared `setup-bazel-ci`
action instead of referencing `setup-bazelisk` directly.
- Added `.github/actions/setup-bazel-ci/**` to the `pull_request` and
`push` path filters in `.github/workflows/v8-canary.yml` so changes to
the shared Bazel setup action still run the canary workflow.
- Kept the existing repository-cache and Windows-specific Bazel setup
logic intact.
This keeps Bazel version selection anchored by `.bazelversion` while
removing the failing dependency on the archived setup action.
## Verification
- Searched `.github/` to confirm there are no remaining `setup-bazelisk`
references.
- Parsed the updated workflow and action YAML locally with Ruby's
`YAML.load_file`.
## Summary
- Pin Rust git patch dependencies to immutable revisions and make
cargo-deny reject unknown git and registry sources unless explicitly
allowlisted.
- Add checked-in SHA-256 coverage for the current rusty_v8 release
assets, wire those hashes into Bazel, and verify CI override downloads
before use.
- Add rusty_v8 MODULE.bazel update/check tooling plus a Bazel CI guard
so future V8 bumps cannot drift from the checked-in checksum manifest.
- Pin release/lint cargo installs and all external GitHub Actions refs
to immutable inputs.
## Future V8 bump flow
Run these after updating the resolved `v8` crate version and checksum
manifest:
```bash
python3 .github/scripts/rusty_v8_bazel.py update-module-bazel
python3 .github/scripts/rusty_v8_bazel.py check-module-bazel
```
The update command rewrites the matching `rusty_v8_<crate_version>`
`http_file` SHA-256 values in `MODULE.bazel` from
`third_party/v8/rusty_v8_<crate_version>.sha256`. The check command is
also wired into Bazel CI to block drift.
## Notes
- This intentionally excludes RustSec dependency upgrades and
bubblewrap-related changes per request.
- The branch was rebased onto the latest origin/main before opening the
PR.
## Validation
- cargo fetch --locked
- cargo deny check advisories
- cargo deny check
- cargo deny check sources
- python3 .github/scripts/rusty_v8_bazel.py check-module-bazel
- python3 .github/scripts/rusty_v8_bazel.py update-module-bazel
- python3 -m unittest discover -s .github/scripts -p
'test_rusty_v8_bazel.py'
- python3 -m py_compile .github/scripts/rusty_v8_bazel.py
.github/scripts/rusty_v8_module_bazel.py
.github/scripts/test_rusty_v8_bazel.py
- repo-wide GitHub Actions `uses:` audit: all external action refs are
pinned to 40-character SHAs
- yq eval on touched workflows and local actions
- git diff --check
- just bazel-lock-check
## Hash verification
- Confirmed `MODULE.bazel` hashes match
`third_party/v8/rusty_v8_146_4_0.sha256`.
- Confirmed GitHub release asset digests for denoland/rusty_v8
`v146.4.0` and openai/codex `rusty-v8-v146.4.0` match the checked-in
hashes.
- Streamed and SHA-256 hashed all 10 `MODULE.bazel` rusty_v8 asset URLs
locally; every downloaded byte stream matched both `MODULE.bazel` and
the checked-in manifest.
## Pin verification
- Confirmed signing-action pins match the peeled commits for their tag
comments: `sigstore/cosign-installer@v3.7.0`, `azure/login@v2`, and
`azure/trusted-signing-action@v0`.
- Pinned the remaining tag-based action refs in Bazel CI/setup:
`actions/setup-node@v6`, `facebook/install-dotslash@v2`,
`bazelbuild/setup-bazelisk@v3`, and `actions/cache/restore@v5`.
- Normalized all `bazelbuild/setup-bazelisk@v3` refs to the peeled
commit behind the annotated tag.
- Audited Cargo git dependencies: every manifest git dependency uses
`rev` only, every `Cargo.lock` git source has `?rev=<sha>#<same-sha>`,
and `cargo deny check sources` passes with `required-git-spec = "rev"`.
- Shallow-fetched each distinct git dependency repo at its pinned SHA
and verified Git reports each object as a commit.
Replaced ci.bazelrc and v8-ci.bazelrc by custom configs inside the main
.bazelrc file. As a result, github workflows setup is simplified down to
a single '--config=<foo>' flag usage.
Moved the build metadata flags to config=ci.
Added custom tags metadata to help differentiate invocations based on
workflow (bazel vs v8) and os (linux/macos/windows).
Enabled users to override the default values in .bazelrc by using a
user.bazelrc file locally.
Added user.bazelrc to gitignore.
Alternative approach, we use rusty_v8 for all platforms that its
predefined, but lets build from source a musl v8 version with bazel for
x86 and aarch64 only. We would need to release this on github and then
use the release.
