astral-sh/uv · error · anyhow::Error

`{}` is missing a valid environment; run `{}` to reinstall

Error message

`{}` is missing a valid environment; run `{}` to reinstall

What it means

Error "`{}` is missing a valid environment; run `{}` to reinstall" thrown in astral-sh/uv.

Source

Thrown at crates/uv/src/commands/tool/upgrade.rs:313

                name.cyan(),
                install_command.green()
            ));
        }
    };

    let environment = match installed_tools.get_environment(name, cache) {
        Ok(Some(environment)) => environment,
        Ok(None) => {
            let install_command = format!("uv tool install {name}");
            return Err(anyhow::anyhow!(
                "`{}` is not installed; run `{}` to install",
                name.cyan(),
                install_command.green()
            ));
        }
        Err(_) => {
            let install_command = format!("uv tool install --force {name}");
            return Err(anyhow::anyhow!(
                "`{}` is missing a valid environment; run `{}` to reinstall",
                name.cyan(),
                install_command.green()
            ));
        }
    };

    // Resolve the appropriate settings, preferring: CLI > receipt > user.
    let options = args.clone().combine(
        ResolverInstallerOptions::from(existing_tool_receipt.options().clone())
            .combine(filesystem.clone()),
    );
    let settings = ResolverInstallerSettings::from(options.clone());

    let build_constraint_requirements = existing_tool_receipt.build_constraints().to_vec();
    let build_constraints =
        Constraints::from_requirements(build_constraint_requirements.iter().cloned());
    let manifest_constraints = existing_tool_receipt

View on GitHub (pinned to f1a42680ff)

When it happens

Trigger: Thrown at crates/uv/src/commands/tool/upgrade.rs:313 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/6abe434a63e7d2d0. Report an issue: GitHub.