{"record":{"id":"ea48aa3541bcd7c6","repo":"jdx/mise","slug":"reason-n-n-instructions-n-nif-pipx-is-already","errorCode":null,"errorMessage":"{reason}.\\n\\n{instructions}\\n\\nIf pipx is already installed, verify it with `mise which pipx` and `pipx --version`.","messagePattern":"(.+?)\\.\\\\n\\\\n(.+?)\\\\n\\\\nIf pipx is already installed, verify it with `mise which pipx` and `pipx --version`\\.","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"src/backend/pipx.rs","lineNumber":378,"sourceCode":"            // below, so it cannot pass on evidence the spawn will then reject. On Windows a\n            // `pipx.ps1` or a shebang-only `pipx.pyz` satisfies the plain lookup but cannot\n            // be launched, and it used to reach `pipx install` and die with\n            // \"program not found\" instead of these instructions.\n            if !pipx_available {\n                let pipx_configured = match self.dependency_toolset(&ctx.config).await {\n                    Ok(ts) => ts.versions.keys().any(|ba| ba.short == \"pipx\"),\n                    Err(_) => false,\n                };\n                let reason = if pipx_configured {\n                    \"pipx is configured but its executable was not found or is not runnable\"\n                        .to_string()\n                } else {\n                    format!(\n                        \"pipx is required to install {} but was not found\",\n                        self.ba()\n                    )\n                };\n                bail!(\n                    \"{reason}.\\n\\n{instructions}\\n\\nIf pipx is already installed, verify it with `mise which pipx` and `pipx --version`.\"\n                );\n            }\n        }\n\n        let request = self.tool_name().parse::<PipxRequest>()?;\n\n        if let Some(uv_program) = uv_program {\n            let package_request = request.uvx_request(&tv.version, &options);\n            self.warn_if_uv_may_not_support_exclude_newer(ctx).await;\n            ctx.pr\n                .set_message(format!(\"uv tool install {package_request}\"));\n            let mut cmd = Self::uvx_cmd(\n                &uv_program,\n                &ctx.config,\n                &[\"tool\", \"install\", &package_request],\n                self,\n                &tv,","sourceCodeStart":360,"sourceCodeEnd":396,"githubUrl":"https://github.com/jdx/mise/blob/afd2eddd3a50c16190efc1c7e94404b48f72af57/src/backend/pipx.rs#L360-L396","documentation":"Thrown by the pipx backend's `install_version_` when the `pipx` executable is required to install a Python-tool request but was not found on the system. mise shells out to an external pipx for these installs; without it there is no way to install the package, so mise fails with instructions on how to verify or install pipx.","triggerScenarios":"Running `mise install`/`mise use pipx:<package>` (e.g. `pipx:ipython`) when `pipx` is absent from PATH, the `pipx_executable` option points to a nonexistent binary, or pipx exists only in an environment not active in the current shell.","commonSituations":"Fresh machine without pipx installed; pipx installed via `pip install --user` but `~/.local/bin` missing from PATH; using mise in CI where Python/pipx aren't provisioned; a configured custom executable path that moved after a Python upgrade.","solutions":["Install pipx and ensure it is on PATH: `pipx --version` to verify; `mise which pipx` to see what mise resolves.","Install pipx through mise itself: `mise use pipx@latest` (or `mise use -g pipx@latest`), then retry the tool install.","If using a custom executable, set the pipx `executable` option/`MISE_PIPX_EXECUTABLE`-style opt to the correct binary path.","In CI, add a step that provisions Python and pipx before running `mise install`."],"exampleFix":"// before (mise.toml)\n[tools]\n\"pipx:black\" = \"24.4.2\"   // fails: no pipx on PATH\n\n// after\n[tools]\npipx = \"latest\"\n\"pipx:black\" = \"24.4.2\"","handlingStrategy":"validation","validationCode":"# run before installing pipx-backed tools\ncommand -v pipx >/dev/null 2>&1 && pipx --version || { echo 'pipx missing'; mise use -g pipx@latest; }","typeGuard":null,"tryCatchPattern":"try { await $`mise install` } catch (e) { if (String(e).includes('pipx is required')) { await $`mise use -g pipx@latest`; await $`mise install`; } else throw e; }","preventionTips":["Declare pipx itself in [tools] before pipx-managed packages","Keep ~/.local/bin (or pipx bindir) on PATH","Provision pipx in CI before running mise install"],"tags":["pipx","install","missing-dependency","python","rust"],"backgroundTag":"missing-dependency","analyzedSha":"afd2eddd3a50c16190efc1c7e94404b48f72af57","analyzedAt":"2026-09-09T01:38:25.179Z","contentChangedAt":"2026-09-09T01:38:25.179Z","schemaVersion":2},"datasetVersion":"2026-09-14T00:17:10.932Z"}