Dockerfile issue with --install-option=\"--prefix=/install\"

[aous72]

In using Dockerfile, when I issue
Docker build . --file ./Dockerfile -t jpylyzer

I get

 => ERROR [builder 5/5] RUN mkdir /install && cd /src/jpylyzer && pip install -U pip && pip install --install-opt  4.2s
------
 > [builder 5/5] RUN mkdir /install && cd /src/jpylyzer && pip install -U pip && pip install --install-option="--prefix=/install" .:
1.764 Requirement already satisfied: pip in /usr/local/lib/python3.6/site-packages (21.2.4)
1.955 Collecting pip
1.998   Downloading pip-21.3.1-py3-none-any.whl (1.7 MB)
2.123 Installing collected packages: pip
2.123   Attempting uninstall: pip
2.124     Found existing installation: pip 21.2.4
2.247     Uninstalling pip-21.2.4:
2.405       Successfully uninstalled pip-21.2.4
3.315 Successfully installed pip-21.3.1
3.315 WARNING: Running pip as the 'root' user can result in broken permissions and conflicting behaviour with the system package manager. It is recommended to use a virtual environment instead: https://pip.pypa.io/warnings/venv
3.922 /usr/local/lib/python3.6/site-packages/pip/_internal/commands/install.py:245: UserWarning: Disabling all use of wheels due to the use of --build-option / --global-option / --install-option.
3.922   cmdoptions.check_install_build_global(options)
3.922 ERROR: Location-changing options found in --install-option: ['--prefix'] from command line. This is unsupported, use pip-level options like --user, --prefix, --root, and --target instead.
------
Dockerfile:11
--------------------
   9 |     WORKDIR /src
  10 |     RUN git clone https://github.com/openpreserve/jpylyzer.git
  11 | >>> RUN mkdir /install && cd /src/jpylyzer && pip install -U pip && pip install --install-option="--prefix=/install" .
  12 |
  13 |     FROM python:3.6-alpine
--------------------
ERROR: failed to solve: process "/bin/sh -c mkdir /install && cd /src/jpylyzer && pip install -U pip && pip install --install-option=\"--prefix=/install\" ." did not complete successfully: exit code: 1

I fixed this by modifying the Dockerfile line
RUN mkdir /install && cd /src/jpylyzer && pip install -U pip && pip install --install-option="--prefix=/install" .
to
RUN mkdir /install && cd /src/jpylyzer && pip install -U pip && pip install --prefix=/install .

I am actually not familiar with this. Perhaps you have a better solution.

Hope this is useful. Thank you.
Aous.

[bitsgalore]

@aous72 thanks for reporting this! Tbh I'm not even completely sure why this particular Docker file is even included. All dockerization stuff was created by @carlwilson to make the packaging platform-independent, but from what I can see this Docker file isn't even used in any of the package builds. I'll try to have another look after my holidays.