pyodide/docs/building_from_sources.md

Building from sources

To install Pyodide from sources follow the steps in the readme.

Partial builds

To build a subset of available packages in pyodide, set the environment variable PYODIDE_PACKAGES to a comma separated list of packages. For instance,

PYODIDE_PACKAGES="toolz,attrs" make

Note that this environment variable must contain both the packages and their dependencies. The package names must match the folder names in packages/ exactly; in particular they are case sensitive.

To build a minimal version of pyodide, set PYODIDE_PACKAGES="micropip". The micropip and package is generally always included for any non empty value of PYODIDE_PACKAGES.

If scipy is included in PYODIDE_PACKAGES, BLAS/LAPACK must be manually built first with make -c CLAPACK.