$(PYTHON) beautifulsoup4 sphinx pygments sphinx_basic_ng | $(PYTHON_TOOLCHAIN)

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All lines of this file are ignored except the first.

From https://github.com/pradyunsg/furo/blob/b4c8010cff5e494a93d617069897964c60b820e9/pyproject.toml#L18-L22
  "beautifulsoup4",
  "sphinx ~= 4.0",
  "pygments ~= 2.7",
