astrid-runtime/astrid · error

`cargo` is not installed or not in PATH. Rust compilation…

Error message

`cargo` is not installed or not in PATH. Rust compilation failed.

What it means

Environment prerequisite check in verify_cargo_available: spawning `cargo --version` failed, so the Rust toolchain is either not installed or not reachable via PATH. Raised before any compilation begins so the user gets a clear toolchain error instead of a cryptic cargo-spawn failure mid-build. Called by build.

Solutions

1. Install Rust via rustup (https://rustup.rs)
2. Ensure `cargo` is on PATH (`which cargo`)
3. If using an isolated environment, install the Rust toolchain there too

When it happens

Trigger: Thrown at crates/astrid-build/src/rust.rs:106 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of astrid-runtime/astrid@affd8760f4 (2026-09-09). Data as JSON: /api/errors/b32ffa58db0ada6a. Report an issue: GitHub.

Appendix: source

Thrown at crates/astrid-build/src/rust.rs:106

        Some(&wasm_path),
        dir,
        &asset_refs,
        wit_staging.as_deref(),
    )?;
    crate::artifact::sign_archive_with_runtime_key(&out_file)?;

    info!("Successfully built Rust capsule: {}", out_file.display());
    Ok(())
}

/// Verify that `cargo` is installed and available on PATH.
fn verify_cargo_available() -> Result<()> {
    if std::process::Command::new("cargo")
        .arg("--version")
        .output()
        .is_err()
    {
        bail!("`cargo` is not installed or not in PATH. Rust compilation failed.");
    }
    Ok(())
}

/// Resolve package metadata for the crate in `dir`.
fn resolve_package_metadata(
    dir: &Path,
) -> Result<(cargo_metadata::Metadata, String, String, String, PackageId)> {
    // Resolve the full dependency graph (not no_deps) so we can locate
    // the astrid-sdk source directory for WIT file bundling.
    let meta = cargo_metadata::MetadataCommand::new()
        .current_dir(dir)
        .exec()
        .context("Failed to parse Cargo metadata")?;

    let package = meta
        .packages
        .iter()

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