[SOLVED] Installing SciPy to PyPy encounters an inner syntax error

I'm on Ubuntu 22.04 "Jammy". I've installed pypy3, and I'm trying to install scipy for it.

This error message was printed out:

ndos@ndos-desktop:~$ pypy3 -m pip install scipy --upgrade
Defaulting to user installation because normal site-packages is not writeable
Requirement already satisfied: scipy in /usr/lib/python3/dist-packages (1.8.0)
Collecting scipy
Using cached scipy-1.9.0.tar.gz (42.0 MB)
Installing build dependencies ... done
Getting requirements to build wheel ... error
error: subprocess-exited-with-error

× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> [54 lines of output]
    The Meson build system
    Version: 0.62.2
    Source dir: /tmp/pip-install-2ov2xi0h/scipy_8ec7415f7e94440e82d27b79cc387e5d
    Build dir: /tmp/pip-install-2ov2xi0h/scipy_8ec7415f7e94440e82d27b79cc387e5d/.mesonpy-mv4soouy/build
    Build type: native build
    Project name: SciPy
    Project version: 1.9.0
    C compiler for the host machine: cc (gcc 11.2.0 "cc (Ubuntu 11.2.0-19ubuntu1) 11.2.0")
    C linker for the host machine: cc ld.bfd 2.38
    C++ compiler for the host machine: c++ (gcc 11.2.0 "c++ (Ubuntu 11.2.0-19ubuntu1) 11.2.0")
    C++ linker for the host machine: c++ ld.bfd 2.38
    Host machine cpu family: x86_64
    Host machine cpu: x86_64
    Compiler for C supports arguments -Wno-unused-but-set-variable: YES
    Library m found: YES
    Fortran compiler for the host machine: gfortran (gcc 11.2.0 "GNU Fortran (Ubuntu 11.2.0-19ubuntu1) 11.2.0")
    Fortran linker for the host machine: gfortran ld.bfd 2.38
    Program cython found: YES (/tmp/pip-build-env-ndkikzz6/overlay/bin/cython)
    Program pythran found: YES (/tmp/pip-build-env-ndkikzz6/overlay/bin/pythran)
    Program cp found: YES (/usr/bin/cp)
    Program python3 found: YES (/usr/bin/pypy3)
    
    ../../scipy/meson.build:40:0: ERROR: Command "/usr/bin/pypy3 -c import os; os.chdir(".."); import numpy; print(numpy.get_include())" failed with status 1.
    
    A full log can be found at /tmp/pip-install-2ov2xi0h/scipy_8ec7415f7e94440e82d27b79cc387e5d/.mesonpy-mv4soouy/build/meson-logs/meson-log.txt
    + meson setup --native-file=/tmp/pip-install-2ov2xi0h/scipy_8ec7415f7e94440e82d27b79cc387e5d/.mesonpy-native-file.ini -Ddebug=false -Doptimization=2 --prefix=/usr /tmp/pip-install-2ov2xi0h/scipy_8ec7415f7e94440e82d27b79cc387e5d /tmp/pip-install-2ov2xi0h/scipy_8ec7415f7e94440e82d27b79cc387e5d/.mesonpy-mv4soouy/build
    Traceback (most recent call last):
        File "/home/ndos/.local/lib/pypy3.8/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 363, in <module>
        main()
        File "/home/ndos/.local/lib/pypy3.8/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 345, in main
        json_out['return_val'] = hook(**hook_input['kwargs'])
        File "/home/ndos/.local/lib/pypy3.8/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 130, in get_requires_for_build_wheel
        return hook(config_settings)
        File "/tmp/pip-build-env-ndkikzz6/overlay/lib/pypy3.8/site-packages/mesonpy/__init__.py", line 909, in get_requires_for_build_wheel
        with _project(config_settings) as project:
        File "/usr/lib/pypy3.8/contextlib.py", line 113, in __enter__
        return next(self.gen)
        File "/tmp/pip-build-env-ndkikzz6/overlay/lib/pypy3.8/site-packages/mesonpy/__init__.py", line 889, in _project
        build_dir=config_settings.get('builddir'),
        File "/usr/lib/pypy3.8/contextlib.py", line 113, in __enter__
        return next(self.gen)
        File "/tmp/pip-build-env-ndkikzz6/overlay/lib/pypy3.8/site-packages/mesonpy/__init__.py", line 547, in with_temp_working_dir
        yield cls(source_dir, tmpdir, build_dir)
        File "/tmp/pip-build-env-ndkikzz6/overlay/lib/pypy3.8/site-packages/mesonpy/__init__.py", line 463, in __init__
        self._configure(reconfigure=bool(build_dir) and not native_file_mismatch)
        File "/tmp/pip-build-env-ndkikzz6/overlay/lib/pypy3.8/site-packages/mesonpy/__init__.py", line 500, in _configure
        *setup_args,
        File "/tmp/pip-build-env-ndkikzz6/overlay/lib/pypy3.8/site-packages/mesonpy/__init__.py", line 477, in _meson
        return self._proc('meson', *args)
        File "/tmp/pip-build-env-ndkikzz6/overlay/lib/pypy3.8/site-packages/mesonpy/__init__.py", line 472, in _proc
        subprocess.check_call(list(args))
        File "/usr/lib/pypy3.8/subprocess.py", line 364, in check_call
        raise CalledProcessError(retcode, cmd)
    subprocess.CalledProcessError: Command '['meson', 'setup', '--native-file=/tmp/pip-install-2ov2xi0h/scipy_8ec7415f7e94440e82d27b79cc387e5d/.mesonpy-native-file.ini', '-Ddebug=false', '-Doptimization=2', '--prefix=/usr', '/tmp/pip-install-2ov2xi0h/scipy_8ec7415f7e94440e82d27b79cc387e5d', '/tmp/pip-install-2ov2xi0h/scipy_8ec7415f7e94440e82d27b79cc387e5d/.mesonpy-mv4soouy/build']' returned non-zero exit status 1.
    [end of output]

note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error

× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> See above for output.

note: This error originates from a subprocess, and is likely not a problem with pip.

I focused on this line:

../../scipy/meson.build:40:0: ERROR: Command "/usr/bin/pypy3 -c import os; os.chdir(".."); import numpy; print(numpy.get_include())" failed with status 1.

As far I've understood, this "command" is invalid because of the nested ""s. Either the inner "" must be escaped, or be replaced by single quotes ''.

How should I resolve this bug?