ImportError: No module named libdnf.transaction

[alitariq4589]

Dear all,
I have a broken pre-installed dnf such that whenever I write dnf on commandline, I get ModuleNotFoundError: No module named 'libdnf'. That's because I installed python3.8.15 from source with --prefix=/usr. So I tried building dnf from source. Build does not give me any error. But when I execute installed binary from dnf/bin/dnf-2, I get following error:

Traceback (most recent call last):
  File "./dnf-2", line 57, in <module>
    from dnf.cli import main
  File "/root/dnf/dnf/__init__.py", line 31, in <module>
    import dnf.base
  File "/root/dnf/dnf/base.py", line 27, in <module>
    import libdnf.transaction
ImportError: No module named libdnf.transaction

My specifications are as follows:
Architecture: riscv64 (I am using hifive unleashed board from sifive).
Distro: Fedora Rawhide