when I run cargo leptos watch I get an error

[GitGreenHand]

➜ moonbound git:(main) ✗ rustup target add wasm32-unknown-unknown
info: downloading component 'rust-std' for 'wasm32-unknown-unknown'
info: installing component 'rust-std' for 'wasm32-unknown-unknown'
➜ moonbound git:(main) ✗ cargo leptos watch
Compiling cfg-if v1.0.0
Compiling once_cell v1.20.2
Compiling memchr v2.7.4
Compiling futures-core v0.3.31
Compiling futures-sink v0.3.31
Compiling pin-project-lite v0.2.14
Compiling serde v1.0.210
Compiling thiserror v1.0.64
Compiling slab v0.4.9
Compiling futures-task v0.3.31
error[E0463]: can't find crate for core
|
= note: the wasm32-unknown-unknown target may not be installed
= help: consider downloading the target with rustup target add wasm32-unknown-unknown

error[E0463]: can't find crate for std
|
= note: the wasm32-unknown-unknown target may not be installed
= help: consider downloading the target with rustup target add wasm32-unknown-unknown

➜ moonbound git:(main) ✗ rustup target list --installed
aarch64-apple-darwin
wasm32-unknown-unknown

[daxpedda]

You might be better served asking at Leptos.

My best guess is that it might be trying to use a different toolchain, not your default one.