@restenb, I came here to ask about the same issue. I was running this command on Windows using Powershell and it failed with the same error. Running the same command on Ubuntu worked fine.

Ah, you probably need to quote things differently on Powershell. No idea what is needed there @eric140 -- try doubling or tripling up the "

Why does deps-new treat io.github.ghuser differently from (say) org.myorg? In particular, the file structure generated by clj -Tnew template :name io.github.ghuser/myghtemplate is different than that generated by clj -Tnew template :name org.myorg/myorgtemplate. In the latter, there are folders called org, but in the former, there are no folders called io or github.

@dorab It's intended to reflect common current practice. See https://github.com/seancorfield/deps-new/blob/develop/doc/names-variables.md#scm-domains for details.