astral-sh/uv · error

Requested extra{s} not found: {}

Error message

Requested extra{s} not found: {}

What it means

Error "Requested extra{s} not found: {}" thrown in astral-sh/uv.

Source

Thrown at crates/uv/src/commands/pip/compile.rs:277

            .chain(
                build_constraints_from_workspace
                    .into_iter()
                    .map(NameRequirementSpecification::from),
            )
            .collect();

    // If all the metadata could be statically resolved, validate that every extra was used. If we
    // need to resolve metadata via PEP 517, we don't know which extras are used until much later.
    if source_trees.is_empty() {
        let mut unused_extras = extras
            .explicit_names()
            .filter(|extra| !used_extras.contains(extra))
            .collect::<Vec<_>>();
        if !unused_extras.is_empty() {
            unused_extras.sort_unstable();
            unused_extras.dedup();
            let s = if unused_extras.len() == 1 { "" } else { "s" };
            return Err(anyhow!(
                "Requested extra{s} not found: {}",
                unused_extras.iter().join(", ")
            ));
        }
    }

    // Find an interpreter to use for building distributions
    let environment_preference = EnvironmentPreference::from_system_flag(system, false);
    let python_preference = python_preference.with_system_flag(system);
    let reporter = PythonDownloadReporter::single(printer);
    let interpreter = if let Some(python) = python.as_ref() {
        let request = PythonRequest::parse(python);
        PythonInstallation::find_or_download(
            Some(&request),
            environment_preference,
            python_preference,
            python_downloads,
            &client_builder,

View on GitHub (pinned to f1a42680ff)

When it happens

Trigger: Thrown at crates/uv/src/commands/pip/compile.rs:277 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of astral-sh/uv@f1a42680ff (2026-08-16). Data as JSON: /api/errors/46ab92e436d51841. Report an issue: GitHub.