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Fix poetry installation on macOS when Python from Xcode Command Line Tools #186

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Fix poetry installation on macOS when Python from Xcode Command Line Tools #186

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fix: Fix poetry installation on macOS when Python from Xcode Command …
caorantaoyao Aug 10, 2026
e3f4b68
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Aug 10, 2026
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14 changes: 13 additions & 1 deletion install-poetry.py
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Original file line number Diff line number Diff line change
Expand Up @@ -327,6 +327,16 @@ def make(cls, target: Path) -> "VirtualEnvironment":
import ensurepip # noqa: F401
import venv

if sys.platform == "darwin" and "/Library/Developer/CommandLineTools" in (
sys.executable or ""
):
# The macOS Xcode Command Line Tools Python is a stub (e.g. /usr/bin/python3 ->
# /Library/Developer/CommandLineTools/usr/bin/python3) whose venv bin/python
# carries an unresolvable `@executable_path/../Python3` loader reference, so
# pip (and therefore the poetry install) fails with a dyld error. Use the
# robust virtualenv bootstrap (--always-copy) below to create a self-contained venv.
raise ImportError

builder = venv.EnvBuilder(clear=True, with_pip=True, symlinks=False)
context = builder.ensure_directories(target)

Expand All @@ -339,7 +349,9 @@ def make(cls, target: Path) -> "VirtualEnvironment":

builder.create(target)
except ImportError:
# fallback to using virtualenv package if venv is not available, eg: ubuntu
# fallback to using virtualenv package if venv is not available (eg: ubuntu)
# or if the base interpreter is the macOS Command Line Tools stub which
# produces a broken venv
python_version = f"{sys.version_info.major}.{sys.version_info.minor}"
virtualenv_bootstrap_url = (
f"https://bootstrap.pypa.io/virtualenv/{python_version}/virtualenv.pyz"
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