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by lmm 3264 days ago
> If the answer to "are my dependencies installed and up to date?" is "well, yes and no, we can't tell which copy I'm actually using", I am not ready to go to prod.

Language package managers are a lot better at that than OS package managers, IME. Much better for all deploys of version x to use the same version than for all deploys to host y to use the same version.