Do not run pip install if no packages to install

This MR fixes #74 (closed).

It also fixes a temporary issue with Sphinx-4.0.1, which does not properly pin Jinja and MarkupSafe dependencies, creating uninstallable environments.

added 1 commit

• 38ddb6b5 - [conda/meta.yaml] Temporary fix to sphinx-4.0.1 packaging fiasco

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changed the description

enabled an automatic merge when the pipeline for 38ddb6b5 succeeds

@dkhalil: this should fix the pipeline problems you observed earlier.

merged

mentioned in commit 6edcc911

mentioned in issue bob#269 (closed)