Unable to install PyPlot (ResolvePackageNotFound conda error)

[Octogonapus]

Unable to install PyPlot (ResolvePackageNotFound conda error)

[stevengj]

If you don't want PyPlot to install its own Conda distro and use that to install matplotlib, then you shouldn't use ENV PYTHON="".

[Octogonapus]

That's fair, my mistake. Here is our actual use case:

FROM ubuntu:22.04

RUN apt-get update -y && \
    apt-get upgrade -y && \
    apt-get install -y wget python3-venv && \
    rm -rf /var/lib/apt/lists/*

RUN wget -nv https://julialang-s3.julialang.org/bin/linux/x64/1.9/julia-1.9.1-linux-x86_64.tar.gz && \
    tar xf julia-1.9.1-linux-x86_64.tar.gz && \
    rm julia-1.9.1-linux-x86_64.tar.gz && \
    ln -s /julia-1.9.1/bin/julia /usr/local/bin/julia

RUN python3 -m venv venv
RUN . venv/bin/activate && \
    pip install -U pip && \
    pip install -U matplotlib==3.7.0
ENV PYTHON="/root/venv/bin/python"
RUN julia -e 'import Pkg; Pkg.add("PyPlot")'
RUN julia -e 'using PyPlot'

The same error occurs:

 > [7/7] RUN julia -e 'using PyPlot':                                                                                                                                                                               
#0 1.434 [ Info: Installing matplotlib via the Conda matplotlib package...                                                                                                                                          
#0 1.435 [ Info: Running `conda install -y matplotlib` in root environment                                                                                                                                          
#0 1.892 Collecting package metadata (current_repodata.json): ...working... done                                                                                                                                    
#0 17.04 Solving environment: ...working... unsuccessful initial attempt using frozen solve. Retrying with flexible solve.                                                                                          
#0 23.96 Solving environment: ...working... unsuccessful attempt using repodata from current_repodata.json, retrying with next repodata source.
#0 27.86 
#0 27.86 ResolvePackageNotFound: 
#0 27.86   - conda==23.1.0