cascalog build problems

edw@li246-89:~/dev/cascalog$ lein compile
Warning: problem requiring hooks: java.lang.IllegalAccessError: extract-javac-tasks is not public (javac.clj:1)
...continuing without hooks completely loaded.
Compiling 31 source files to /home/edw/dev/cascalog/classes
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
WARNING: :namespaces in project.clj is deprecated; use :aot.
WARNING: :namespaces in project.clj is deprecated; use :aot.
Compiling cascalog.api
Compiling cascalog.basic-flow
Compiling cascalog.debug
Compiling cascalog.graph
Compiling cascalog.io
Compiling cascalog.ops
Compiling cascalog.ops-impl
Compiling cascalog.playground
Compiling cascalog.predicate
Compiling cascalog.rules
Compiling cascalog.testing
Compiling cascalog.util
Compiling cascalog.vars
Compiling cascalog.workflow
edw@li246-89:~/dev/cascalog$