I figured I’d drop a quick note here for anyone else running into an issue. If you are trying to do a sonatypeRelease via sbt 1.0.3 on travis and getting a

  
Credentials file /home/travis/.sbt/credentials does not exist

Even though you are supplying your own inline creds, just drop in a fake creds file into that location:

  
realm=Sonatype Nexus Repository Manager  
host=x.y.z  
user=none  
password=none

Via

  
cp scripts/creds.fake /home/travis/.sbt/credentials

And save yourself the 2 days of headache I have had :p