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close this post it’s resolved!

My guess is you’ll need to build the package yourself.

What is the motivation for running such old version of snapd?

What, exactly, are you trying to do? You changed your question from getting a snapcraft.yaml of a snap, to getting a particular version of snapd. What are you trying to accomplish?

You should not run snapd 2.21. It has serious security vulnerabilities that have been fixed since.


there’s a way to get snapcraft.yaml of a snap ? because I’ve an open source app and I want edit source and snapcraft it again to gain time, else there’s a way for developer mode ?


… and what does this have to do with installing snapd 2.21 in ubuntu 18.04?


I edited the post , now could you answer my main questions please ?