How to use pyo3 as build-dependency when targets to wasm32-unknown-emscripten

[rabbit19981023]

hello,

I have some build scripts in build.rs that need pyo3 as a build-dependency.

When running $ maturin build --target wasm32-unknown-emscripten -i python3.11, I got the errors:

error: failed to run custom build command for `pyo3-ffi v0.18.2`

Caused by:
  process didn't exit successfully: `xxx/target/debug/build/pyo3-ffi-942deca9802a9e45/build-script-build` (exit status: 1)
  --- stdout
  cargo:rerun-if-env-changed=PYO3_PRINT_CONFIG

  --- stderr
  error: your Rust target architecture (64-bit) does not match your python interpreter (32-bit)
warning: build failed, waiting for other jobs to finish...
💥 maturin failed
  Caused by: Failed to build a native library through cargo
  Caused by: Cargo build finished with "exit status: 101": `PYO3_CONFIG_FILE="xxx/target/maturin/pyo3-config-wasm32-unknown-emscripten-3.11.txt" RUSTFLAGS=" -Z link-native-libraries=no" "cargo" "rustc" "--features" "pyo3/extension-module" "--target" "wasm32-unknown-emscripten" "--manifest-path" "xxx/Cargo.toml" "--message-format" "json" "--lib" "--" "-C" "link-arg=-sSIDE_MODULE=2" "-C" "link-arg=-sWASM_BIGINT"`

Here's my Cargo.toml:

[package]
name = "xxx"
version = "0.1.0"
edition = "2021"

[lib]
name = "xxx"
crate-type = ["cdylib"]

[dependencies]
pyo3 = "0.18.1"
ruzstd = "0.3.1"
vaporetto = "0.6.3"

[build-dependencies]
pyo3 = "0.18.1"
ruzstd = "0.3.1"
vaporetto = "0.6.3"

When just leaving fn main() { } in build.rs, the problem is still the same. However, when removing pyo3 from build-dependencies, the problem has gone.

Could anyone help me to solve the problem?