Github user ottobackwards commented on the issue:
https://github.com/apache/metron/pull/775
I just did your steps with a fresh branch from apache/master. And although
I get rpm lint errors about scripts without shebangs for all the node js
scripts, I **do** get RPMs built.
[build.log](https://github.com/apache/metron/files/1376934/build.log)
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