QST: Install from source without blas with pip

When trying out latest release candidate:

From: pyproj4/pyproj#1330 (comment)

Is there an environment variable you can set to not require blas when installing numpy?

/meson.build:207:4: ERROR: Problem encountered: No BLAS library detected! Install one, or use the `allow-noblas` build option (note, this may be up to 100x slower for some linear algebra operations).