Export usage error when doing example from sbt docs - scala

Question

The sbt tutorial shows this example.
$ mkdir hello
$ cd hello
$ echo 'object Hi { def main(args: Array[String]) = println("Hi!") }' > hw.scala
$ sbt
...
> run
...
Hi!
However, when I try it, I get this:
$ mkdir hello
$ cd hello
$ echo 'object Hi { def main(args: Array[String]) = println("Hi!") }' > hw.scala
$ sbt
[info] Set current project to hello (in build file:/Users/coryklein/playground/hello/)
[error] export usage:
[error] export <tasks>+ Executes tasks and displays the equivalent command lines.
[error]
[error] export
[error]
My sbt version
$ sbt --version
sbt launcher version 0.13.6
Am I doing something wrong here?
Here is the output of sh -x sbt
+ '[' -f /Users/coryklein/.sbtconfig ']'
+ exec /usr/local/Cellar/sbt/0.13.6/libexec/sbt
[info] Set current project to hello (in build file:/Users/coryklein/playground/hello/)
[error] export usage:
[error] export <tasks>+ Executes tasks and displays the equivalent command lines.
[error]
[error] export
[error]
I installed sbt via brew install sbt.
$ ll `which sbt`
lrwxr-xr-x 1 coryklein admin 28B Oct 14 16:03 /usr/local/bin/sbt -> ../Cellar/sbt/0.13.6/bin/sbt
I'm trying to look through the source code to figure out what the problem is, but it's difficult when a working sbt is required to build sbt from source. :(

Answer 1

I was unable to figure out exactly why it failed to work, but I resolved it by doing the manual install like so:
brew remove sbt
wget https://dl.bintray.com/sbt/native-packages/sbt/0.13.6/sbt-0.13.6.tgz
extract sbt-0.13.6.tgz
mv sbt/bin/sbt-launch.jar ~/bin
echo 'SBT_OPTS="-Xms512M -Xmx1536M -Xss1M -XX:+CMSClassUnloadingEnabled -XX:MaxPermSize=256M"\n
java $SBT_OPTS -jar `dirname $0`/sbt-launch.jar "$#"' > ~/bin/sbt
chmod u+x ~/bin/sbt