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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: install in development mode fails","articleBody":"### Bug summary\n\nI'm trying to install matplotlib in development mode for a PR, and I'm using this for installing it in dev mode (from [here](https://matplotlib.org/devdocs/devel/development_setup.html#install-matplotlib-in-editable-mode)):\n\n```bash\npython -m pip install --verbose --no-build-isolation --editable \".[dev]\"\n```\n\nI've tried all the basic stuffs (removing/re-creating the venv, etc), but I don't understand the error.\n\n### Code for reproduction\n\nRight after I git cloned and cd matplotlib:\n\n```Python\npython -m venv venv\nsource venv/bin/activate\npip install -r requirements/dev/dev-requirements.txt\npip install -r requirements/doc/doc-requirements.txt\npip install -r requirements/testing/all.txt\npython -m pip install --verbose --no-build-isolation --editable \".[dev]\"\n```\n\n### Actual outcome\n\nUsing pip 22.0.4 from /Users/josephbarbier/Desktop/matplotlib/venv/lib/python3.10/site-packages/pip (python 3.10)\nObtaining file:///Users/josephbarbier/Desktop/matplotlib\n  Running command Checking if build backend supports build_editable\n  Checking if build backend supports build_editable ... done\n  Running command Preparing editable metadata (pyproject.toml)\n  + meson setup /Users/josephbarbier/Desktop/matplotlib /Users/josephbarbier/Desktop/matplotlib/build/cp310 -Dbuildtype=release -Db_ndebug=if-release -Db_vscrt=md --native-file=/Users/josephbarbier/Desktop/matplotlib/build/cp310/meson-python-native-file.ini\n  The Meson build system\n  Version: 1.8.0\n  Source dir: /Users/josephbarbier/Desktop/matplotlib\n  Build dir: /Users/josephbarbier/Desktop/matplotlib/build/cp310\n  Build type: native build\n  Program python3 python found: NO found 3.10.5 but need: '\u003e= 3.11'\n\n  ../../meson.build:6:4: ERROR: Program 'python3 python' not found or not executable\n\n  A full log can be found at /Users/josephbarbier/Desktop/matplotlib/build/cp310/meson-logs/meson-log.txt\n  error: subprocess-exited-with-error\n\n  × Preparing editable metadata (pyproject.toml) did not run successfully.\n  │ exit code: 1\n  ╰─\u003e See above for output.\n\n  note: This error originates from a subprocess, and is likely not a problem with pip.\n  full command: /Users/josephbarbier/Desktop/matplotlib/venv/bin/python /Users/josephbarbier/Desktop/matplotlib/venv/lib/python3.10/site-packages/pip/_vendor/pep517/in_process/_in_process.py prepare_metadata_for_build_editable /var/folders/m2/jfzxyg4s0xz3jyw5f94r7tcm0000gn/T/tmpwu3byzgi\n  cwd: /Users/josephbarbier/Desktop/matplotlib\n  Preparing editable metadata (pyproject.toml) ... error\nerror: metadata-generation-failed\n\n× Encountered error while generating package metadata.\n╰─\u003e See above for output.\n\nnote: This is an issue with the package mentioned above, not pip.\nhint: See above for details.\n\n### Expected outcome\n\nSuccessfully install matplotlib in development mode.\n\n### Additional information\n\n- I'm not sure why I have this version of Python installed here\n\n- I tried with pip latest (25.1.1), and it doesn't change anything\n\n- `meson-log.txt`\n\nBuild started at 2025-05-11T19:18:42.156591\nMain binary: /Users/josephbarbier/Desktop/matplotlib/venv/bin/python\nBuild Options: -Dbuildtype=release -Db_ndebug=if-release -Db_vscrt=md --native-file=/Users/josephbarbier/Desktop/matplotlib/build/cp310/meson-python-native-file.ini\nPython system: Darwin\nThe Meson build system\nVersion: 1.8.0\nSource dir: /Users/josephbarbier/Desktop/matplotlib\nBuild dir: /Users/josephbarbier/Desktop/matplotlib/build/cp310\nBuild type: native build\nRunning command: /Users/josephbarbier/Desktop/matplotlib/venv/bin/python --version\n--- stdout ---\nPython 3.10.5\n\n--- stderr ---\n\n\nProgram python3 python found: NO found 3.10.5 but need: '\u003e= 3.11'\n\n../../meson.build:6:4: ERROR: Program 'python3 python' not found or not executable\n\n\n### Operating system\n\nMacOS Sequoia 15.4.1\n\n### Matplotlib Version\n\n3.10.3\n\n### Matplotlib Backend\n\nmacosx\n\n### Python version\n\nPython 3.10.5\n\n### Jupyter version\n\n_No response_\n\n### Installation\n\npip","author":{"url":"https://github.com/JosephBARBIERDARNAL","@type":"Person","name":"JosephBARBIERDARNAL"},"datePublished":"2025-05-11T17:28:50.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":9},"url":"https://github.com/30038/matplotlib/issues/30038"}