The conda recipe of this package says that is linux only

{% set name = 'bob.learn.pytorch' %}
{% set project_dir = environ.get('RECIPE_DIR') + '/..' %}

package:
  name: {{ name }}
  version: {{ environ.get('BOB_PACKAGE_VERSION', '0.0.1') }}

build:
  skip: true  # [not linux]
  entry_points:
    - train_cnn.py = bob.learn.pytorch.scripts.train_cnn:main

However, even if this OS should be skipped, it still tries to resolve its dependencies

Check, https://gitlab.idiap.ch/bob/bob.learn.pytorch/-/jobs/220183 Is it a bug?