DioxusLabs/dioxus · error · anyhow::Error

Failed to add dependency {} to Cargo.toml

Error message

Failed to add dependency {} to Cargo.toml

What it means

Raised in add_rust_dependencies when the cargo command generated to add a component's dependency (e.g. `cargo add`) either fails to spawn or completes with a failure indication for that dependency. This is an external tool failure around the dependency named in the message — the crate could not be added to Cargo.toml, typically due to registry/network issues or an unavailable crate version.

Source

Thrown at packages/cli/src/cli/component.rs:329

        }

        Ok(config.components.registry.clone())
    }

    /// Add any rust dependencies required for a component
    async fn add_rust_dependencies(dependencies: &HashSet<CargoDependency>) -> Result<()> {
        for dep in dependencies {
            let status = Command::from(dep.add_command())
                .status()
                .await
                .with_context(|| {
                    format!(
                        "Failed to run command to add dependency {} to Cargo.toml",
                        dep.name()
                    )
                })?;
            if !status.success() {
                bail!("Failed to add dependency {} to Cargo.toml", dep.name());
            }
        }

        Ok(())
    }
}

/// Arguments for the default or custom remote registry
/// If both values are None, the default registry will be used
#[derive(Clone, Debug, Parser, Default, Serialize, Deserialize, JsonSchema)]
pub struct RemoteComponentRegistry {
    /// The url of the component registry
    #[arg(long)]
    git: Option<String>,

    /// The revision of the component registry
    #[arg(long)]
    rev: Option<String>,

View on GitHub (pinned to 24f6a829df)

Solutions

1. The dependency could not be added to Cargo.toml. Check the dependency name and version and that Cargo.toml is writable.

When it happens

Trigger: Thrown at packages/cli/src/cli/component.rs:329 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of DioxusLabs/dioxus@24f6a829df (2026-08-23). Data as JSON: /api/errors/e4f5123722b4693d. Report an issue: GitHub.