httpx Bug in the 0.7.0 packaging (Fix)

The Fix

Upgrade to version 0.7.2 or later.

Based on closed encode/httpx issue #233 · PR/commit linked

Production note: Most teams hit this during upgrades or environment changes. Roll out with a canary and smoke critical endpoints (health, OpenAPI/docs) before 100%.

Jump to Verify Open PR/Commit

@@ -1,5 +1,9 @@
 # Changelog
 
+## 0.7.1 (August 18, 2019)
+
+- Include files with source distribution to be installable. (Pull #233)

repro.py

pip install httpx
Collecting httpx
  Downloading https://files.pythonhosted.org/packages/12/b3/fdd6e528a3385e2149ad42cc4e9b54e326d532e3e79a86e7cfdaea45723e/httpx-0.7.0.tar.gz (41kB)
     |████████████████████████████████| 51kB 1.4MB/s
    ERROR: Complete output from command python setup.py egg_info:
    ERROR: Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/private/var/folders/73/4w3335w5157419t63g0ghx4h0000gn/T/pip-install-yw4ftz0n/httpx/setup.py", line 45, in <module>
        long_description=get_long_description(),
      File "/private/var/folders/73/4w3335w5157419t63g0ghx4h0000gn/T/pip-install-yw4ftz0n/httpx/setup.py", line 26, in get_long_description
        with open("CHANGELOG.md", encoding="utf8") as f:
    FileNotFoundError: [Errno 2] No such file or directory: 'CHANGELOG.md'
    ----------------------------------------
ERROR: Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/73/4w3335w5157419t63g0ghx4h0000gn/T/pip-install-yw4ftz0n/httpx/

verify

Re-run: poetry update

fix.md

Option A — Upgrade to fixed release\nUpgrade to version 0.7.2 or later.\nWhen NOT to use: This fix should not be used if the package is not being installed from source.\n\n

Why This Fix Works in Production

Trigger: $ poetry update
Mechanism: Release 0.7.1 fixes the packaging issue by including necessary files in the source distribution.
Why the fix works: Release 0.7.1 fixes the packaging issue by including necessary files in the source distribution. (first fixed release: 0.7.2).

Production impact:

If left unfixed, the same config can fail only in production (env differences), causing startup failures or partial feature outages.

Why This Breaks in Prod

Shows up under Python 3.8 in real deployments (not just unit tests).
Surfaces as: $ poetry update

Proof / Evidence

GitHub issue: #233
Fix PR: https://github.com/encode/httpx/pull/234
First fixed release: 0.7.2
Reproduced locally: No (not executed)
Last verified: 2026-02-09
Confidence: 0.85
Did this fix it?: Yes (upstream fix exists)
Own content ratio: 0.14

Discussion

High-signal excerpts from the issue thread (symptoms, repros, edge-cases).

Jump to Sources Open on GitHub

“I can replicate simply doing pip install httpx: I can't see a MANIFEST.in file in our repo, how are we adding these files to the…”

@yeraydiazdiaz · 2019-08-18 · source

“Yep this is an issue, I'm fixing this up creating a PR now and releasing 0.7.1.”

@sethmlarson · 2019-08-18 · source

“Awesome, thanks for the amazing response time ⚡️ 😄”

@yeraydiazdiaz · 2019-08-18 · source

“Just so happened to be awake at 5am lol went back to bed after :)”

@sethmlarson · 2019-08-18 · source

Failure Signature (Search String)

$ poetry update

Error Message

Stack trace

error.txt

Error Message
-------------
$ poetry update
Updating dependencies
Resolving dependencies... (1.0s)


Package operations: 0 installs, 1 update, 0 removals

  - Updating httpx (0.6.8 -> 0.7.0)

[EnvCommandError]
Command ['/Users/pablo/Library/Caches/pypoetry/virtualenvs/drop-eventsng-1aNj3rOl-py3.7/bin/python', '-m', 'pip', 'install', '--no-deps', '-U', 'httpx==0.7.0'] errored with the following return code 1, and output:
Collecting httpx==0.7.0
  Using cached https://files.pythonhosted.org/packages/12/b3/fdd6e528a3385e2149ad42cc4e9b54e326d532e3e79a86e7cfdaea45723e/httpx-0.7.0.tar.gz
    ERROR: Command errored out with exit status 1:
     command: /Users/pablo/Library/Caches/pypoetry/virtualenvs/drop-eventsng-1aNj3rOl-py3.7/bin/python -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/folders/x4/txc7_0pn6zlfb30cs_0sh5mm0000gn/T/pip-install-jq6aut9d/httpx/setup.py'"'"'; __file__='"'"'/private/var/folders/x4/txc7_0pn6zlfb30cs_0sh5mm0000gn/T/pip-install-jq6aut9d/httpx/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base pip-egg-info
         cwd: /private/var/folders/x4/txc7_0pn6zlfb30cs_0sh5mm0000gn/T/pip-install-jq6aut9d/httpx/
    Complete output (7 lines):
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File
... (truncated) ...

Stack trace

error.txt

Error Message
-------------
pip install httpx
Collecting httpx
  Downloading https://files.pythonhosted.org/packages/12/b3/fdd6e528a3385e2149ad42cc4e9b54e326d532e3e79a86e7cfdaea45723e/httpx-0.7.0.tar.gz (41kB)
     |████████████████████████████████| 51kB 1.4MB/s
    ERROR: Complete output from command python setup.py egg_info:
    ERROR: Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/private/var/folders/73/4w3335w5157419t63g0ghx4h0000gn/T/pip-install-yw4ftz0n/httpx/setup.py", line 45, in <module>
        long_description=get_long_description(),
      File "/private/var/folders/73/4w3335w5157419t63g0ghx4h0000gn/T/pip-install-yw4ftz0n/httpx/setup.py", line 26, in get_long_description
        with open("CHANGELOG.md", encoding="utf8") as f:
    FileNotFoundError: [Errno 2] No such file or directory: 'CHANGELOG.md'
    ----------------------------------------
ERROR: Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/73/4w3335w5157419t63g0ghx4h0000gn/T/pip-install-yw4ftz0n/httpx/

Stack trace

error.txt

Error Message
-------------
ERROR: Command errored out with exit status 1:
 command: /Users/pablo/Library/Caches/pypoetry/virtualenvs/drop-eventsng-1aNj3rOl-py3.7/bin/python -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/folders/x4/txc7_0pn6zlfb30cs_0sh5mm0000gn/T/pip-install-jq6aut9d/httpx/setup.py'"'"'; __file__='"'"'/private/var/folders/x4/txc7_0pn6zlfb30cs_0sh5mm0000gn/T/pip-install-jq6aut9d/httpx/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base pip-egg-info
     cwd: /private/var/folders/x4/txc7_0pn6zlfb30cs_0sh5mm0000gn/T/pip-install-jq6aut9d/httpx/
Complete output (7 lines):
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/private/var/folders/x4/txc7_0pn6zlfb30cs_0sh5mm0000gn/T/pip-install-jq6aut9d/httpx/setup.py", line 45, in <module>
    long_description=get_long_description(),
  File "/private/var/folders/x4/txc7_0pn6zlfb30cs_0sh5mm0000gn/T/pip-install-jq6aut9d/httpx/setup.py", line 26, in get_long_description
    with open("CHANGELOG.md", encoding="utf8") as f:
FileNotFoundError: [Errno 2] No such file or directory: 'CHANGELOG.md'
----------------------------------------

Minimal Reproduction

repro.py

pip install httpx
Collecting httpx
  Downloading https://files.pythonhosted.org/packages/12/b3/fdd6e528a3385e2149ad42cc4e9b54e326d532e3e79a86e7cfdaea45723e/httpx-0.7.0.tar.gz (41kB)
     |████████████████████████████████| 51kB 1.4MB/s
    ERROR: Complete output from command python setup.py egg_info:
    ERROR: Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/private/var/folders/73/4w3335w5157419t63g0ghx4h0000gn/T/pip-install-yw4ftz0n/httpx/setup.py", line 45, in <module>
        long_description=get_long_description(),
      File "/private/var/folders/73/4w3335w5157419t63g0ghx4h0000gn/T/pip-install-yw4ftz0n/httpx/setup.py", line 26, in get_long_description
        with open("CHANGELOG.md", encoding="utf8") as f:
    FileNotFoundError: [Errno 2] No such file or directory: 'CHANGELOG.md'
    ----------------------------------------
ERROR: Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/73/4w3335w5157419t63g0ghx4h0000gn/T/pip-install-yw4ftz0n/httpx/

Environment

Python: 3.8

What Broke

Users experienced installation failures due to missing files in the package.

Fix Options (Details)

Option A — Upgrade to fixed release Safe default (recommended)

Upgrade to version 0.7.2 or later.

When NOT to use: This fix should not be used if the package is not being installed from source.

Use when you can deploy the upstream fix. It is usually lower-risk than long-lived workarounds.

Fix reference: https://github.com/encode/httpx/pull/234

First fixed release: 0.7.2

Last verified: 2026-02-09. Validate in your environment.

When NOT to Use This Fix

This fix should not be used if the package is not being installed from source.

Verify Fix

verify

Re-run: poetry update

Did This Fix Work in Your Case?

Quick signal helps us prioritize which fixes to verify and improve.

Prevention

Add a CI check that diffs key outputs after upgrades (OpenAPI schema snapshots, JSON payload shapes, CLI output).
Upgrade behind a canary and run integration tests against the canary before 100% rollout.

Version Compatibility Table

Version	Status
0.7.2	Fixed

Related Issues

No related fixes found.

Cluster: httpx:configuration-error All hubs All clusters

Related clusters: Data consistency Other Timeout

Sources

We don’t republish the full GitHub discussion text. Use the links above for context.

httpx Bug in the 0.7.0 packaging (Fix)

The Fix

Why This Fix Works in Production

Why This Breaks in Prod

Proof / Evidence

Discussion

Failure Signature (Search String)

Error Message

Minimal Reproduction

Environment

What Broke

Fix Options (Details)

Option A — Upgrade to fixed release Safe default (recommended)

Get updates

When NOT to Use This Fix

Verify Fix

Did This Fix Work in Your Case?

Prevention

Version Compatibility Table

Related Issues

Sources