diagnose-venv-shebang-mismatch

name	diagnose-venv-shebang-mismatch
description	Diagnose and fix ModuleNotFoundError caused by entry point shebang pointing outside virtual environment
version	1.0.0
source	auto-extracted
extracted	"2026-04-10T00:00:00.000Z"
metadata	{"tags":["python","venv","debugging","shebangs"]}

Diagnose Virtual Environment Shebang Mismatch

When a CLI tool throws ModuleNotFoundError for an installed package, check if the entry point shebang (#!/usr/bin/env python3) resolves to a different Python than the venv where the package is installed. Verify the installed script location (which <command>) against the actual venv path. Update the shebang to explicitly point to the venv's Python binary (#!/path/to/venv/bin/python3). Note: reinstalls/updates may revert shebangs to generic defaults — check post-install hooks if this recurs.