Using the nightbuild SNAPSHOT versions of the LRA microprofile spec as dependency in the Narayana code is unstable and as it disappears after some time from the Eclipse repository it's not possible to build Narayana from released tag.

The casual milestone release M1 is to be released to freeze the current state of the spec and for to be used in Narayana when it will be released.
See https://ci.eclipse.org/microprofile/job/MicroProfile%20Releases/378/