Unable to build or instlal scipy-1.2.1 on Arm7 Ubuntu

Question

I am unable to install scipy-1.2.1 on Arm7 Ubuntu OS. I am following steps below.

cd scipy-1.2.1
python setup.py install

Note, I have installed cython version 0.20.1post0.

I am getting an error as below:

> Processing scipy/linalg/_decomp_update.pyx.in
Processing scipy/linalg/cython_blas.pyx

Error compiling Cython file:
------------------------------------------------------------
...
# and object. In this file, only NULL is passed to these parameters.
cdef extern from *:
    cnp.ndarray PyArray_CheckFromAny(object, void*, int, int, int, void*)
    cnp.ndarray PyArray_FromArray(cnp.ndarray, void*, int)

from . cimport cython_blas as blas_pointers
      ^
------------------------------------------------------------

_decomp_update.pyx:66:7: Relative cimport is not supported yet
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/hummingbird/MATLAB_HB/MyScipy/scipy-1.2.1/tools/cythonize.py", line 306, in <module>
    main()
  File "/usr/lib/python2.7/dist-packages/hummingbird/MATLAB_HB/MyScipy/scipy-1.2.1/tools/cythonize.py", line 302, in main
    find_process_files(root_dir)
  File "/usr/lib/python2.7/dist-packages/hummingbird/MATLAB_HB/MyScipy/scipy-1.2.1/tools/cythonize.py", line 291, in find_process_files
    for result in pool.imap_unordered(lambda args: process(*args), jobs):
  File "/usr/lib/python2.7/multiprocessing/pool.py", line 659, in next
    raise value
Exception: Cython failed
Traceback (most recent call last):
  File "setup.py", line 492, in <module>
    setup_package()
  File "setup.py", line 476, in setup_package
    generate_cython()
  File "setup.py", line 253, in generate_cython
    raise RuntimeError("Running cythonize failed!")
RuntimeError: Running cythonize failed!