# ERROR: Cannot install foo==1.0 and bar==2.0 because these package versions have conflicting dependencies. ResolutionTooDeep: 2000000

- **ID:** `python/pip-resolution-too-deep`
- **Domain:** python
- **Category:** install_error
- **Verification:** ai_generated
- **Fix Rate:** 80%

## Root Cause

The backtracking resolver exceeded its search depth because two or more packages require mutually exclusive versions of a shared dependency, creating an unsatisfiable constraint graph.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| 3.x | active | — | — |

## Workarounds

1. **** (85% success)
   ```
   # Inspect the conflict
pip install --dry-run foo==1.0 bar==2.0
# Relax pins to compatible ranges
pip install 'foo>=1.0,<2' 'bar>=2.0,<3'
   ```
2. **** (80% success)
   ```
   pip install uv
uv pip install foo==1.0 bar==2.0
   ```

## Dead Ends

- **** — The constraint set is unsatisfiable; more rounds just burns CPU before failing again. (85% fail)
- **** — Skips dependency installation, leaving imports broken at runtime. (70% fail)