Temporal API not available in Alpine v26 images

[jnoordsij]

Environment

• Platform: Alpine (any)
• Docker Version: n/a
• Node.js Version: 26.0.0
• Image Tag: 26-alpine

Expected Behavior

Temporal API to be available.

Current Behavior

Temporal API not available. From #2474 (comment):

root@sv:~# docker run --rm -it --pull always node:26-alpine node -e "console.log(Temporal)"
26-alpine: Pulling from library/node
d17f077ada11: Already exists 
4dcf4452caaa: Pull complete 
4ea5683016df: Pull complete 
Digest: sha256:30f5a66e7265ef70aac56b4753ffa7905e54eca1084bc25503893ad8e9273f05
Status: Downloaded newer image for node:26-alpine
[eval]:1
console.log(Temporal)
            ^

ReferenceError: Temporal is not defined
    at [eval]:1:13
    at runScriptInThisContext (node:internal/vm:219:10)
    at node:internal/process/execution:483:12
    at [eval]-wrapper:6:24
    at runScriptInContext (node:internal/process/execution:481:60)
    at evalFunction (node:internal/process/execution:315:30)
    at evalTypeScript (node:internal/process/execution:327:3)
    at node:internal/main/eval_string:71:3

Node.js v26.0.0

Works using 26-slim

Possible Solution

Alpine builds logs (listed in #2474) from https://unofficial-builds.nodejs.org/logs/202605051424-v26.0.0/ seem to suggest missing rust/cargo support on builder. From https://unofficial-builds.nodejs.org/logs/202605051424-v26.0.0/musl.log:

WARNING: cargo not found! Support for Temporal will be disabled.
WARNING: rustc not found! Support for Temporal will be disabled.

Steps to Reproduce

See above

Additional Information

[nikeee]

I think the build env of the musl builds are just missing the rust toolchain:
https://github.com/nodejs/unofficial-builds/blob/main/recipes/musl/Dockerfile

[MikeMcC399]

@jnoordsij

It sounds like you have already tracked down the reason.

The Docker repo here simply installs from https://unofficial-builds.nodejs.org/download/release/v26.0.0/ so it doesn't have any influence on the musl build content.

If you don't get a response / resolution here, I'd suggest using https://github.com/nodejs/unofficial-builds/issues.

[nikeee]

I've opened nodejs/unofficial-builds#227 to adress the issue with the unofficial builds. It seems that only x64-musl is pulled from there and the other architectures build from source (see Dockerfiles).
So we'd have to add the rust toolchain to this repository as well.

Edit: There is also #2476, which changes musl-arm to be pulled form the unofficial-builds. Maybe we'd keep that in mind.