The latest development versions of 1.2.1 are available as nightly builds on Typesafe Snapshots.
To use a nightly build, the instructions are the same for normal manual setup except:
1.2.1.x-yyyyMMdd-HHmmss. Use this in a build.properties file.
sbt-nightlyto retain access to a stable sbt launcher. The documentation will refer to the script as sbt, however.
Related to the third point, remember that an
sbt.version setting in
<build-base>/project/build.properties determines the version of sbt to
use in a project. If it is not present, the default version associated
with the launcher is used. This means that you must set
sbt.version=yyyyMMdd-HHmmss in an existing
<build-base>/project/build.properties. You can verify the right
version of sbt is being used to build a project by running
To reduce problems, it is recommended to not use a launcher jar for one nightly version to launch a different nightly version of sbt.