How to build? Missing duckdb-mvp.js

[pgarrison]

I am trying to build duckdb-wasm from source, on macOS. I am following these instructions from the README:

git clone https://github.com/duckdb/duckdb-wasm.git
cd duckdb-wasm
git submodule init
git submodule update
make apply_patches
make serve

In addition to those steps, I've installed ccache (from homebrew) and emsdk (from source).

My build is failing at make serve with the following error:

Error: Command failed: sed -i.bak 's/require(["'\'']child_process["'\''])/["child_process"].map(require)/g' ./src/bindings/duckdb-mvp.js && rm ./src/bindings/duckdb-mvp.js.bak
sed: ./src/bindings/duckdb-mvp.js: No such file or directory

    at genericNodeError (node:internal/errors:984:15)
    at wrappedFn (node:internal/errors:538:14)
    at checkExecSyncError (node:child_process:891:11)
    at execSync (node:child_process:963:15)
    at patchFile (file:///Users/philip.garrison/workspace/aics/duckdb-wasm/packages/duckdb-wasm/bundle.mjs:369:5)
    at file:///Users/philip.garrison/workspace/aics/duckdb-wasm/packages/duckdb-wasm/bundle.mjs:104:5
    at file:///Users/philip.garrison/workspace/aics/duckdb-wasm/packages/duckdb-wasm/bundle.mjs:359:3
    at ModuleJob.run (node:internal/modules/esm/module_job:325:25)
    at async ModuleLoader.import (node:internal/modules/esm/loader:606:24)
    at async asyncRunEntryPointWithESMLoader (node:internal/modules/run_main:117:5)

I do have duckdb-mvp.d.ts, but not duckdb-mvp.js. What should I do?