pip install on python 3.9 doesn't work

[hjalmarlucius]

Error message from reference to thunk_imatmul.

  ERROR: Command errored out with exit status 1:
   command: /usr/bin/python -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-o6sah0tg/lazy-python_3b981e4a66b34a179fc888227623b3aa/setup.py'"'"'; __file__='"'"'/tmp/pip-install-o6sah0tg/lazy-python_3b981e4a66b34a179fc888227623b3aa/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' bdist_wheel -d /tmp/pip-wheel-mp1rxb1w
       cwd: /tmp/pip-install-o6sah0tg/lazy-python_3b981e4a66b34a179fc888227623b3aa/
  Complete output (47 lines):
  running bdist_wheel
  running build
  running build_py
  creating build
  creating build/lib.linux-x86_64-3.9
  creating build/lib.linux-x86_64-3.9/lazy
  copying lazy/runtime.py -> build/lib.linux-x86_64-3.9/lazy
  copying lazy/__init__.py -> build/lib.linux-x86_64-3.9/lazy
  copying lazy/utils.py -> build/lib.linux-x86_64-3.9/lazy
  copying lazy/tree.py -> build/lib.linux-x86_64-3.9/lazy
  copying lazy/bytecode.py -> build/lib.linux-x86_64-3.9/lazy
  creating build/lib.linux-x86_64-3.9/lazy/data
  copying lazy/data/list_.py -> build/lib.linux-x86_64-3.9/lazy/data
  copying lazy/data/__init__.py -> build/lib.linux-x86_64-3.9/lazy/data
  copying lazy/data/empty.py -> build/lib.linux-x86_64-3.9/lazy/data
  creating build/lib.linux-x86_64-3.9/lazy/include
  copying lazy/include/__init__.py -> build/lib.linux-x86_64-3.9/lazy/include
  creating build/lib.linux-x86_64-3.9/lazy/tests
  copying lazy/tests/test_undefined.py -> build/lib.linux-x86_64-3.9/lazy/tests
  copying lazy/tests/test_utils.py -> build/lib.linux-x86_64-3.9/lazy/tests
  copying lazy/tests/test_tree.py -> build/lib.linux-x86_64-3.9/lazy/tests
  copying lazy/tests/__init__.py -> build/lib.linux-x86_64-3.9/lazy/tests
  copying lazy/tests/test_thunk.py -> build/lib.linux-x86_64-3.9/lazy/tests
  copying lazy/tests/test_lazy_function.py -> build/lib.linux-x86_64-3.9/lazy/tests
  copying lazy/tests/test_strict.py -> build/lib.linux-x86_64-3.9/lazy/tests
  creating build/lib.linux-x86_64-3.9/lazy/data/tests
  copying lazy/data/tests/test_list.py -> build/lib.linux-x86_64-3.9/lazy/data/tests
  copying lazy/data/tests/__init__.py -> build/lib.linux-x86_64-3.9/lazy/data/tests
  running build_ext
  building 'lazy._undefined' extension
  creating build/temp.linux-x86_64-3.9
  creating build/temp.linux-x86_64-3.9/lazy
  gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -march=x86-64 -mtune=generic -O3 -pipe -fno-plt -fno-semantic-interposition -march=x86-64 -mtune=generic -O3 -pipe -fno-plt -march=x86-64 -mtune=generic -O3 -pipe -fno-plt -fPIC -Ilazy/include -I/usr/include/python3.9 -c lazy/_undefined.c -o build/temp.linux-x86_64-3.9/lazy/_undefined.o
  gcc -pthread -shared -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now -fno-semantic-interposition -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now build/temp.linux-x86_64-3.9/lazy/_undefined.o -L/usr/lib -o build/lib.linux-x86_64-3.9/lazy/_undefined.cpython-39-x86_64-linux-gnu.so
  building 'lazy._thunk' extension
  gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -march=x86-64 -mtune=generic -O3 -pipe -fno-plt -fno-semantic-interposition -march=x86-64 -mtune=generic -O3 -pipe -fno-plt -march=x86-64 -mtune=generic -O3 -pipe -fno-plt -fPIC -Ilazy/include -I/usr/include/python3.9 -c lazy/_thunk.c -o build/temp.linux-x86_64-3.9/lazy/_thunk.o
  lazy/_thunk.c:863:18: error: ‘thunk_imatmul’ undeclared here (not in a function); did you mean ‘thunk_matmul’?
    863 |     (binaryfunc) thunk_imatmul,
        |                  ^~~~~~~~~~~~~
        |                  thunk_matmul
  lazy/_thunk.c:708:5: warning: ‘thunk_thunk_imatmul’ defined but not used [-Wunused-function]
    708 |     thunk_ ## name(PyObject *self, PyObject *other)             \
        |     ^~~~~~
  lazy/_thunk.c:722:1: note: in expansion of macro ‘THUNK_INPLACE’
    722 | THUNK_INPLACE(thunk_imatmul, PyNumber_InPlaceMatrixMultiply)
        | ^~~~~~~~~~~~~
  error: command '/opt/cuda/bin/gcc' failed with exit code 1
  ----------------------------------------
  ERROR: Failed building wheel for lazy-python