The compilation instructions of scalafx says to do:

export JAVAFX_HOME=/Path/To/javafx-sdk2.1.0-beta
sbt clean compile package make-pom package-src

However, with the new packaging of JavaFX as part of the Java JDK itself (i.e. 7u7 for OS X) there no longer seems to be such a 'javafx-sdkx.x.x' folder. The Oracle docs say that JavaFX JDK is placed alongside the main Java JDK (in same folders).

So I do:

$ export JAVAFX_HOME=/Library/Java/JavaVirtualMachines/jdk1.7.0_07.jdk
$ sbt clean
[warn] Using project/plugins/ (/Users/asko/Sources/scalafx/project/plugins) for plugin configuration is deprecated.
[warn] Put .sbt plugin definitions directly in project/,
[warn]   .scala plugin definitions in project/project/,
[warn]   and remove the project/plugins/ directory.
[info] Loading project definition from /Users/asko/Sources/scalafx/project/plugins/project
[info] Loading project definition from /Users/asko/Sources/scalafx/project/plugins
[error] java.lang.NullPointerException
[error] Use 'last' for the full log.
Project loading failed: (r)etry, (q)uit, (l)ast, or (i)gnore? 

Am I doing something wrong or is scalafx not yet compatible with the latest Java release (7u7, JavaFX 2.2). What can I do?

http://code.google.com/p/scalafx/

Addendum

..and finally (following Igor's solution below) sbt run launches the colorful circles demo easily (well, if one has a supported GPU that is). Oracle claims that "JavaFX supports graphic hardware acceleration on any Mac OS X system that is Lion or later" but I am inclined to think the NVidia powered Mac Mini I'm using does software rendering. A recent MacBook Air (core i7) is a complete different beast! :)