# ERROR: Could not find a version that satisfies the requirement somepackage==999.0.0 (from versions: 0.1, 0.2, 1.0)

- **ID:** `python/pip-no-matching-distribution`
- **Domain:** python
- **Category:** config_error
- **Verification:** ai_generated
- **Fix Rate:** 80%

## Root Cause

The specified version constraint does not match any available release on PyPI or the configured index.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| 3.8 | active | — | — |
| 3.9 | active | — | — |
| 3.10 | active | — | — |
| 3.11 | active | — | — |

## Workarounds

1. **Check available versions and use a valid one** (95% success)
   ```
   `pip index versions somepackage` then install a valid version, e.g., `pip install somepackage==1.0`
   ```
2. **Use a version range or no version constraint** (90% success)
   ```
   `pip install somepackage>=1.0` or simply `pip install somepackage`
   ```

## Dead Ends

- **Assuming the package name is correct but using a typo in version** — The version string is exact; even a minor typo (e.g., 999.0.0 vs 999.0) will fail. (50% fail)
- **Running `pip install --upgrade` without specifying the correct version** — If the package is not installed, --upgrade has no effect; also, it won't fix an invalid version constraint. (80% fail)