Issues with RBE v8 build authenticated through @chromium account

[Ned Nguyen]

Hi,

Hi,

I am trying to setup RBE build authenticated with my @chromium.org account on a non Google corp machine, but run into these issues:

$ cat ../.gclient
solutions = [
  {
    "name": "v8",
    "url": "https://chromium.googlesource.com/v8/v8.git",
    "deps_file": "DEPS",
    "managed": False,
    "custom_deps": {},
    "custom_vars": {
      # Correct instance for non-corp / external contributors
      "rbe_instance": "projects/rbe-chromium-untrusted/instances/default_instance",
    },
  },
]
$ set SISO_CREDENTIAL_HELPER=gcloud

$ siso login

$ gn gen out/v8 --args='is_debug=false target_cpu="x64" use_remoteexec=true'

$ autoninja -C out/v8 d8
ninja: Entering directory `out/v8'
use RBE instance "projects/rbe-chromium-untrusted/instances/default_instance"

 0.62s Error: rpc error: code = PermissionDenied desc = Permission "remotebuildexecution.blobs.get" denied on resource "projects/rbe-chromium-untrusted/instances/default_instance" (or it may not exist)

I wonder if I did any step wrong and how would I address this?

Thanks,

Ned

[Takuto Ikuta]

Did you follow "Siso (non-corp/personal machine)" step in http://shortn/_1k4gy1tC8I? I geuss you are not member of https://groups.google.com/g/rbe-chromium-external-access/members.

[Fumitoshi Ukai (鵜飼文敏)]

Also need to export SISO_CREDENTIAL_HELPER environment variable.

`set` just sets it as a shell variable, not as an environment variable.

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[Ned Nguyen]

Hi Takuto and Fumitoshi for the diagnosis!

 Do you know how can I apply to be a member of   https://groups.google.com/g/rbe-chromium-external-access/members ?

To unsubscribe from this group and stop receiving emails from it, send an email to chromium-dev+unsubscribe@chromium.org.

[Ned Nguyen]

Hi Takuto and Fumitoshi for the diagnosis!

 Do you know how can I apply to be a member of   https://groups.google.com/g/rbe-chromium-external-access/members ?

On Monday, March 9, 2026 at 1:08:18 AM UTC-6 Fumitoshi Ukai (鵜飼文敏) wrote:

To unsubscribe from this group and stop receiving emails from it, send an email to chromium-dev+unsubscribe@chromium.org.

[Takuto Ikuta (生田 拓人)]

You can ask acco...@chromium.org to add your account there.

To unsubscribe from this group and stop receiving emails from it, send an email to chromium-dev...@chromium.org.

To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/chromium-dev/6d58fc35-9fe7-4386-8138-6cbc8f9fa617n%40chromium.org.

--

Takuto Ikuta

Software Engineer in Tokyo

Chrome Ops (chrome browser build team)

[Fumitoshi Ukai (鵜飼文敏)]

fyi: go/siso-auth