{"record":{"id":"4c3d4fd0682619e6","repo":"jdx/mise","slug":"pipx-was-found-during-dependency-validation-but-co","errorCode":null,"errorMessage":"pipx was found during dependency validation but could not be launched while installing {}.\\n\\nVerify the configured executable with `mise which pipx` and `pipx --version`. If pipx is unavailable, reinstall it with `mise use pipx@latest`.","messagePattern":"pipx was found during dependency validation but could not be launched while installing (.+?)\\.\\\\n\\\\nVerify the configured executable with `mise which pipx` and `pipx --version`\\. If pipx is unavailable, reinstall it with `mise use pipx@latest`\\.","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"src/backend/pipx.rs","lineNumber":456,"sourceCode":"                &[\"install\", &package_request],\n                self,\n                &tv,\n                &ctx.ts,\n                ctx.pr.as_ref(),\n            )\n            .await?;\n            cmd = cmd.args(Self::pip_uploaded_prior_to_args(ctx.before_date));\n            if let Some(args) = options.pipx_args() {\n                cmd = cmd.args(shell_words::split(args)?);\n            }\n            if let Err(err) = cmd.execute() {\n                let not_found = err.chain().any(|cause| {\n                    cause\n                        .downcast_ref::<std::io::Error>()\n                        .is_some_and(|io| io.kind() == std::io::ErrorKind::NotFound)\n                });\n                if not_found {\n                    bail!(\n                        \"pipx was found during dependency validation but could not be launched while installing {}.\\n\\nVerify the configured executable with `mise which pipx` and `pipx --version`. If pipx is unavailable, reinstall it with `mise use pipx@latest`.\",\n                        self.ba()\n                    );\n                }\n                return Err(err);\n            }\n        }\n\n        // Fix venv Python symlink to use minor version path\n        // This allows patch upgrades (3.12.1 → 3.12.2) to work without reinstalling\n        let pkg_name = self.tool_name();\n        fix_venv_python_symlink(&tv.install_path(), &pkg_name)?;\n\n        Ok(tv)\n    }\n\n    fn resolve_lockfile_options(\n        &self,","sourceCodeStart":438,"sourceCodeEnd":474,"githubUrl":"https://github.com/jdx/mise/blob/afd2eddd3a50c16190efc1c7e94404b48f72af57/src/backend/pipx.rs#L438-L474","documentation":"Thrown by the pipx backend's `install_version_` when dependency validation found a pipx executable, but actually launching it during install failed with an io NotFound error (binary vanished, is not executable, or is a broken shim). mise distinguishes this from pipx simply being absent at validation time and asks the user to verify the configured executable.","triggerScenarios":"During `mise install` of a pipx package, mise spawned the pipx executable that passed earlier dependency validation, and the spawn (or an error in the chain) returned `std::io::ErrorKind::NotFound` — e.g. the executable was removed between validation and install, PATH changed mid-run, or the resolved path is a dangling symlink/broken shim.","commonSituations":"pipx managed by mise was uninstalled or upgraded (symlink replaced) while another mise process ran; a shim points to a removed Python venv; antivirus/quarantine removed the binary; PATH differs between the shell that validated and the environment install runs in.","solutions":["Reinstall pipx: `mise use pipx@latest` (or your preferred installer), then verify with `mise which pipx` and `pipx --version`.","Check the configured executable path for broken symlinks (`ls -l $(mise which pipx)`) and fix or repoint the pipx executable option.","Re-run the install in a fresh shell so PATH and mise shims are consistent.","If pipx is quarantined/removed by security software, re-add an exclusion and reinstall."],"exampleFix":null,"handlingStrategy":"retry","validationCode":"# verify pipx is resolvable AND launchable before installing\nexe=$(mise which pipx) && \"$exe\" --version || { mise use -g pipx@latest; }","typeGuard":null,"tryCatchPattern":"try { await $`mise install` } catch (e) { if (String(e).includes('could not be launched')) { await $`mise use -g pipx@latest`; await $`mise install`; } else throw e; }","preventionTips":["Run installs from a fresh shell with consistent PATH/shims","Don't uninstall/upgrade pipx while another mise process runs","Check pipx executable symlinks for dangling targets"],"tags":["pipx","install","command-not-found","python","rust"],"backgroundTag":"command-not-found","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"}