Recurrent Scala build environment regression around sbt-extras (Download failed. Obtain the jar manually)



In I just saw

0.25s$ sbt "+ test"
Downloading sbt launcher for 1.2.7:
    To  /home/travis/.sbt/launchers/1.2.7/sbt-launch.jar
Download failed. Obtain the jar manually and place it at /home/travis/.sbt/launchers/1.2.7/sbt-launch.jar
The command "sbt "+ test"" exited with 1.

This is a really old bug of sbt-extras that was fixed in May of 2016 (, since sbt 1 launchers are no longer published to

For some reason, sbt has been working ok so maybe there’s some other process that’s happening to grab a later version of sbt-extras, but it seems to periodically revert back to this one.

Side note


There are two pending pull requests: