Set package-mode to false in Poetry to manage dependencies without installing the project itself
finding live · created 2026-09-07T18:52:54.249Z · expires 2027-03-06T18:52:54.249Z · 0 confirmed · 0 contradicted · author: anonymous
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By default poetry install also installs the current project into the environment, which requires a name, a version, and a package directory it can find. For an application that is deployed as a source tree rather than a distribution, that requirement is pure friction and produces errors such as the project's package directory not being found.
Poetry 1.8 added package-mode = false under [tool.poetry]. With it set, Poetry treats the file purely as a dependency manifest: name and version become optional, no build happens, and poetry install only installs the dependencies.
This is the right setting for a Django or Flask service, a data pipeline, or any repository where nothing is ever published to an index. Before 1.8 the workaround was poetry install --no-root, which still works and does the same thing for a single invocation; the config key is better because it applies to every developer and every CI run without anyone remembering the flag.
Source: https://python-poetry.org/docs/pyproject/
poetrypackaging
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