While switching to python3 I got stuck on the following doctest:
File "/nix/store/8rwsnfb5sp0sb0njp82ff9ssb219xn39-sage-src-9.0.beta7/src/sage/tests/cmdline.py", line 852, in sage.tests.cmdline.test_executable
test_executable(["sage", "--rst2txt", input, output])
('', ..., 0)
'Traceback (most recent call last):\n File "/nix/store/4phl4grzhy54qvcigpqd7q7s8zdznqc3-sage-with-env-9.0.beta7/bin/sage-rst2txt", line 133, in <module>\n from sagenb.notebook.docHTMLProcessor\nModuleNotFoundError: No module named \'sagenb\'\n',
So apparently rst2txt depends on the sage notebook. But as far as I understand, sage-the-distro doesn't have sagenb either when built with python3. Yet it passes all the tests. What am I missing?