Cannot install with yarn

Not sure if you care, but trying to install `pack.re` with yarn fails like this:

```bash
❯ yarn global add pack.re
yarn global v1.3.2
[1/4] 🔍 Resolving packages...
[2/4] 🚚 Fetching packages...
warning Pattern ["bs-platform@bsansouci/bsb-native#2.1.1"] is trying to unpack in the same destination "/Users/xxx/Library/Caches/Yarn/v1/npm-bs-platform-2.1.1-d76155b709dba032cdb11e99ebe0e2c37bcb2c85" as pattern ["bs-platform@github:bsansouci/bsb-native#fast"]. This could result in a non deterministic behavior, skipping.
warning vscode-languageclient@3.5.0: The engine "vscode" appears to be invalid.
[3/4] 🔗 Linking dependencies...
[4/4] 📃 Building fresh packages...
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error /Users/xxx/.config/yarn/global/node_modules/matchenv: Command failed.
Exit code: 127
Command: bsb && cp lib/bs/native/index.native matchenv
Arguments:

```

Reproduce the failure with `yarn global add pack.re` and inspect the `matchenv` package build step shown in the error. Start with the `bsb` command and the copy of `lib/bs/native/index.native`; done means the global installation completes successfully without exit code 127.

Written by the indexing model from the issue text.