Basic python 3.8 environment.yml fails to build on mybinder.org

[sjdv1982]

Bug description

The repo2docker deployment on mybinder.org fails to build a rather minimal python 3.8 environment. There is no problem when I run jupyter-repo2docker locally.

Expected behaviour

The Docker image should build correctly on mybinder.org.

Actual behaviour

Error message on mybinder.org:

Step 39/50 : RUN TIMEFORMAT='time: %3R' bash -c 'time ${MAMBA_EXE} env update -p ${NB_PYTHON_PREFIX} --file "environment.yml" && time ${MAMBA_EXE} clean --all -f -y && ${MAMBA_EXE} list -p ${NB_PYTHON_PREFIX} '
 ---> Running in 61de79e486ad


Looking for: ['python=3.8', 'ipython=7.33']

Encountered problems while solving:
  - package ipython-7.33.0-py310hff52083_0 requires python >=3.10,<3.11.0a0, but none of the providers can be installed

How to reproduce

To get the bugged behavior on mybinder.org:

1. Go to https://mybinder.org/v2/gh/sjdv1982/seamless-binder-demo/bug
2. See error.

To get the correct behavior with a local execution

Run jupyter-repo2docker --ref bug 'https://github.com/sjdv1982/seamless-binder-demo'

environment.yml

name: seamless-binder-demo
channels:
  - conda-forge
dependencies:
  - python=3.8
  - ipython==7.33.*

Your personal set up

• OS: Linux
• Docker version:
  Client: Docker Engine - Community
  Version: 20.10.22
  API version: 1.41
  Go version: go1.18.9
  Git commit: 3a2c30b
  Built: Thu Dec 15 22:28:04 2022
  OS/Arch: linux/amd64
  Context: default
  Experimental: true

Server: Docker Engine - Community
Engine:
Version: 20.10.22
API version: 1.41 (minimum version 1.12)
Go version: go1.18.9
Git commit: 42c8b31
Built: Thu Dec 15 22:25:49 2022
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: 1.6.14
GitCommit: 9ba4b250366a5ddde94bb7c9d1def331423aa323
runc:
Version: 1.1.4
GitCommit: v1.1.4-0-g5fd4c4d
docker-init:
Version: 0.19.0
GitCommit: de40ad0

• repo2docker version : 2022.10.0

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[yamaton]

I'm just a passerby. The Dockerfile in the repository inherits your custom image

FROM rpbs/seamless-binder-demo@sha256:7a48d63d5fd834427676adf9c3fdb95bee906d3a2a646e4a6bb28f44c8462346

so it's not "basic", and the problem looks specific to your setup.

[sjdv1982]

I'm just a passerby. The Dockerfile in the repository inherits your custom image

FROM rpbs/seamless-binder-demo@sha256:7a48d63d5fd834427676adf9c3fdb95bee906d3a2a646e4a6bb28f44c8462346

so it's not "basic", and the problem looks specific to your setup.

That is just my workaround, to side-step the bug. The basic setup is in the "bug" branch.

[yamaton]

Sorry. My mind was fried.

I've also confirmed the error locally.

repo2docker --debug --image-name test-basic .

where the directory contains simple environment.yml.

name: seamless-binder-demo
channels:
  - conda-forge
dependencies:
  - python=3.8
  - ipython==7.33.*

OS: Ubuntu 22.04.1 LTS on Windows 11 WSL2
Docker Desktop 4.15.0
repo2docker: 2022.10.0+89.g49162fc

[manics]

I just tried https://mybinder.org/v2/gh/sjdv1982/seamless-binder-demo/bug today and it's working. My guess is an update in a dependency led to an incompatibility between packages, which was subsequently fixed by another release.