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The uuid package in distribution was created as a utility for the distribution project itself, to cut down external dependencies (see [1][1]). For compose, this has the reverse effect, as it now brings all the dependencies of the distribution module with it. This patch switches to the uuid generation to crypto/rand to produce a random id. I was considering using a different uuid implementation, or docker's "stringid.GenerateRandomID", but all of those are doing more than needed, so keep it simple. Currently, this change has little effect, because compose also uses the distribution module for other purposes, but the distribution project is in the process of moving the "reference" package to a separate module, in which case we don't want to depend on the distribution module only for the uuid package. [1]: https://github.com/distribution/distribution/commit/36e34a55ad127a80d008813cd25133a4e0ba5fb3 Signed-off-by: Sebastiaan van Stijn <[email protected]>