conda build works but not conda install : conflicts in environment

Question

I am trying to build a python package for a python library with a C++ back-end : https://gitlab.com/cytosim/cytosim/-/tree/pybind

I managed to have a working package for pip that compiles and installs well, provided the adequate libraries are install in the system (pip3 install cytosim works).

Now I am making the conda package with the meta.yaml file shown below.

In a clean virtual machine (Ubuntu 22.04) with conda installed and updated, I can build the package with conda build -c conda-forge . without issue.

However when I want to actually install it with conda install -c local cytosim, I get an error... That depends on the environment.

In a clean env myenv I get :

Solving environment: unsuccessful initial attempt using frozen solve. Retrying with flexible solve. Solving environment: - Found conflicts! Looking for incompatible packages. This can take several minutes. Press CTRL-C to abort. failed ResolvePackageNotFound:

libstdcxx-ng[version='>=12']

I tried to add libstdcxx-ng>=12 to the requirements (in build, host, run), to no avail.

In base I have another error message :

Solving environment: unsuccessful initial attempt using frozen solve. Retrying with flexible solve. Solving environment: | Found conflicts! Looking for incompatible packages. This can take several minutes. Press CTRL-C to abort. failed
UnsatisfiableError: The following specifications were found to be incompatible with each other: Output in format: Requested package -> Available versionsThe following specifications were found to be incompatible with your system:

feature:/linux-64::__glibc==2.35=0

feature:|@/linux-64::__glibc==2.35=0 Your installed version is: 2.35

Any clue on what I could do ?

Here is the meta.yaml file :

{% set name = "cytosim" %}
{% set version = "0.0.10" %}

package:
  name: "{{ name|lower }}"
  version: "{{ version }}"

source:
  url: "https://pypi.io/packages/source/{{ name[0] }}/{{ name }}/{{ name }}-{{ version }}.tar.gz"

build:
  number: 0
  script: "{{ PYTHON }} -m pip install . -vv"

requirements:
  build:
    - cmake>=3.14
    - make 
    - {{compiler('cxx')}}
    - libblas
    - liblapack
    - pybind11
  host:
    - pip
    - python
  run:
    - python

conda build works but not conda install : conflicts in environment

0 Answers0