buliding rumpkernel -- hurd-amd64 sources not available?

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I wanted to build rumpkernel to enable nvme.

I updated my HURD-AMD64 virtual machine to the latest sources. I 
downloaded the rumpkernel from the snapshot site manually.

But apt build-dep rumpkernel will not work as it says it skipped not 
finding the source in InRelease in both the current and the snapshot 
deb-src's . I did earlier this year acquire the sources, but for reason 
now it is failing.

I added the modernized sources to this e-mail.

Any clues welcome. Thanks.

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