npm install failed on Apple silicon

[mununki]

Hi

I faced the issue to fail to install bs-let with npm on Apple silicon. I guess that the prebuilt binary is missing for this architecture. Can I build natively to install? or any solution to install bs-let?

bs-let does not support this platform :(

bs-let comes prepacked as built binaries to avoid large
dependencies at build-time.

If you want bs-let to support this platform natively,
please open an issue at our repository, linked above. Please
specify that you are on the darwin platform,
on the arm64 architecture.
node:internal/fs/utils:320
    throw err;
    ^

Error: ENOENT: no such file or directory, copyfile '.../node_modules/bs-let/bs-let-darwin-arm64.exe' -> '.../node_modules/bs-let/ppx'

[em]

I found a temporary workaround, by making a separate repo from the installed npm module, and updating the bin copying function to copy the x64 executable instead, when process.arch is arm64. This works, because the x64 build is not a lib and executed independently, rosetta2 detects it's x64 and handles it automatically.

Can use my hack repo in your package.json:
"bs-let": "em/bs-let-m1-compat#master",