What I ended up doing was downgrading MySQL to 5.6 in the affected environments.

On Tue, Feb 20, 2018 at 4:51 AM, Jochen Bick <jochen.bick@usys.ethz.ch> wrote:
Thanks, nate,

can you tell me one I can update? And what i need to update?

Cheers Jochen

On 15.02.2018 16:24, Nate Coraor wrote:
> Hi Jochen,
>
> I ran in to this yesterday, we're working on fixing it right now. It's due
> to this:
>
> https://github.com/bioconda/bioconda-recipes/issues/5430
>
> And because Galaxy's converters use the `ucsc_tools` IUC conda metapackage,
> which still points to the old versions. I have an update here:
>
> https://github.com/galaxyproject/conda-iuc/pull/14
>
> Once that is available you should be able to `conda update ucsc_tools` the
> affected environments. I am also working on switching all of the
> requirements so they depend on the individual ucsc-* packages from Bioconda
> instead of the metapackage so we shouldn't need to maintain it in the
> future.
>
> --nate
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