How to fix How to fix 'pip subprocess error' in Python in Python

PythonINTERMEDIATEMEDIUMUpdated Dec 7, 2025· 193 views

A subprocess called by pip (usually for building wheels) failed with an error. The root cause is often in the subprocess error message, not in pip itself.

Quick fix

Fixes How to fix 'pip subprocess error' in Python

  1. Verify the root cause
  2. Apply the appropriate fix
  3. Retry the installation
python — error
# How to fix 'pip subprocess error' in Python

What this error means

pip works by calling subprocesses: calling git to clone repos, running setup.py scripts, compiling C code. If any subprocess returns a non-zero exit code, pip reports a subprocess error and stops installation.

Typical symptoms

  • pip install fails with 'subprocess error'
  • Error message points to specific subprocess that failed
  • Full error traceback shows subprocess call
  • Works with different package or installation method
  • Error appears before or after wheel building
  • Subprocess output shows the actual problem
  • Retry sometimes succeeds (network flake)

Common causes

  1. Subprocess (git, compiler, setup.py) failed
  2. Network failure during git clone in subprocess
  3. Build failure in subprocess (compiler error)
  4. Missing tool that subprocess depends on
  5. Permission denied in subprocess
  6. Subprocess ran out of memory or disk
  7. Subprocess timed out

How to fix this error

1Verify the root cause

Review the error message above and identify which cause applies to your situation. Run additional diagnostics if needed.

2Apply the appropriate fix

Follow the corresponding solution from the causes section above.

3Retry the installation

Once you've addressed the root cause, try running 'pip install' again.

Frequently asked questions

What does "How to fix 'pip subprocess error' in Python" mean?
py scripts, compiling C code. If any subprocess returns a non-zero exit code, pip reports a subprocess error and stops installation.
How do I fix "How to fix 'pip subprocess error' in Python"?
A subprocess called by pip (usually for building wheels) failed with an error. The root cause is often in the subprocess error message, not in pip itself.
What causes "How to fix 'pip subprocess error' in Python"?
Subprocess (git, compiler, setup.py) failed Network failure during git clone in subprocess Build failure in subprocess (compiler error)
Is the "How to fix 'pip subprocess error' in Python" error serious?
It is a medium-severity error — more of a blocker than a risk. The steps above resolve it.

Official resources & further reading