runner.conda: Explicitly install the latest package version during setup #312
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This our intent and expectation, and it's good to be explicit about it. It may surface more installation issues, such as the one we observed in monkeypox CI¹ with the latest version not being installable, but obscuring those or surfacing them later on is probably worse than addressing them head on earlier. This change will mean that any macOS 10.14 users, if any, would have to use
since newer versions aren't installable for them.²
This behaviour also parallels update's behaviour since "runner.conda: Explicitly specify a nextstrain-base version when updating" (d6e4f2b). It was an oversight (on my part) to not use the same behaviour during setup, but at the time I was focused on fixing an update bug.
Related-to: nextstrain/conda-base#41
Related-to: nextstrain/conda-base#42
¹ nextstrain/mpox#177
² nextstrain/conda-base#38
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