Mysqlclient causes Error installing requirements, can't deploy app

Full Error:

Collecting mysqlclient==2.2.1 (from -r /mount/src/preis_app/requirements.txt (line 20))
  Downloading mysqlclient-2.2.1.tar.gz (89 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 90.0/90.0 kB 11.2 MB/s eta 0:00:00[2024-04-26 11:20:19.627384] 
  Installing build dependencies: started
  Installing build dependencies: finished with status 'done'
  Getting requirements to build wheel: started
  Getting requirements to build wheel: finished with status 'error'
  error: subprocess-exited-with-error
  
  × Getting requirements to build wheel did not run successfully.
  │ exit code: 1
  ╰─> [27 lines of output]
      /bin/sh: 1: pkg-config: not found
      /bin/sh: 1: pkg-config: not found
      /bin/sh: 1: pkg-config: not found
      Trying pkg-config --exists mysqlclient
      Command 'pkg-config --exists mysqlclient' returned non-zero exit status 127.
      Trying pkg-config --exists mariadb
      Command 'pkg-config --exists mariadb' returned non-zero exit status 127.
      Trying pkg-config --exists libmariadb
      Command 'pkg-config --exists libmariadb' returned non-zero exit status 127.
      Traceback (most recent call last):
        File "/home/adminuser/venv/lib/python3.9/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 353, in <module>
          main()
        File "/home/adminuser/venv/lib/python3.9/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 335, in main
          json_out['return_val'] = hook(**hook_input['kwargs'])
        File "/home/adminuser/venv/lib/python3.9/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 118, in get_requires_for_build_wheel
          return hook(config_settings)
        File "/tmp/pip-build-env-ighl0rgt/overlay/lib/python3.9/site-packages/setuptools/build_meta.py", line 325, in get_requires_for_build_wheel
          return self._get_build_requires(config_settings, requirements=['wheel'])
        File "/tmp/pip-build-env-ighl0rgt/overlay/lib/python3.9/site-packages/setuptools/build_meta.py", line 295, in _get_build_requires
          self.run_setup()
        File "/tmp/pip-build-env-ighl0rgt/overlay/lib/python3.9/site-packages/setuptools/build_meta.py", line 311, in run_setup
          exec(code, locals())
        File "<string>", line 155, in <module>
        File "<string>", line 49, in get_config_posix
        File "<string>", line 28, in find_package_name
      Exception: Can not find valid pkg-config name.
      Specify MYSQLCLIENT_CFLAGS and MYSQLCLIENT_LDFLAGS env vars manually
      [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.
Checking if Streamlit is installed

This is the requirements.txt
altair==5.2.0
attrs==23.2.0
blinker==1.7.0
cachetools==5.3.3
certifi==2024.2.2
charset-normalizer==3.3.2
click==8.1.7
colorama==0.4.6
gitdb==4.0.11
GitPython==3.1.42
greenlet==3.0.3
idna==3.6
Jinja2==3.1.3
joblib==1.3.2
jsonschema==4.21.1
jsonschema-specifications==2023.12.1
markdown-it-py==3.0.0
MarkupSafe==2.1.5
mdurl==0.1.2
mysqlclient==2.2.1
numpy==1.26.4
packaging==23.2
pandas==2.2.1
pillow==10.2.0
protobuf==4.25.3
pyarrow==15.0.2
pydeck==0.8.1b0
Pygments==2.17.2
python-dateutil==2.9.0.post0
pytz==2024.1
referencing==0.34.0
requests==2.31.0
rich==13.7.1
rpds-py==0.18.0
scikit-learn==1.4.1.post1
scipy==1.12.0
six==1.16.0
smmap==5.0.1
SQLAlchemy==2.0.29
streamlit==1.32.2
tenacity==8.2.3
threadpoolctl==3.4.0
toml==0.10.2
toolz==0.12.1
tornado==6.4
typing_extensions==4.10.0
tzdata==2024.1
urllib3==2.2.1
watchdog==4.0.0

problem solved

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