conflicting cross-version suffixes in geotrellis-transit

[levareg]

Using vagrant's precise64 box to start ./deployment/provision.sh development,
http://127.0.0.1/monitoring/ shows that the indicator-calc-scala process does not exist.

Trying to start the porcess manually by issuing the command found in /etc/init/oti-geotrellis returns the following error :

_Detected sbt version 0.13.5
Using /home/vagrant/.sbt/0.13.5 as sbt dir, -sbt-dir to override.
[info] Loading project definition from /projects/open-transit-indicators/scala/project
[info] Compiling 1 Scala source to /projects/open-transit-indicators/scala/project/target/scala-2.10/sbt-0.13/classes...
[info] Set current project to OTI_ROOT (in build file:/projects/open-transit-indicators/scala/)
[info] Set current project to gtfs-parser (in build file:/projects/open-transit-indicators/scala/)
[error] Modules were resolved with conflicting cross-version suffixes in {file:/projects/open-transit-indicators/scala/}geotrellis-transit:
[error] io.spray:spray-httpx , _2.10
[error] io.spray:spray-can _2.10,
[error] io.spray:spray-util , _2.10
[error] io.spray:spray-io _2.10,
[error] io.spray:spray-client _2.10,
[error] io.spray:spray-http , 2.10
java.lang.RuntimeException: Conflicting cross-version suffixes in: io.spray:spray-httpx, io.spray:spray-can, io.spray:spray-util, io.spray:spray-io, io.spray:spray-client, io.spray:spray-http
at scala.sys.package$.error(package.scala:27)
at sbt.ConflictWarning$.processCrossVersioned(ConflictWarning.scala:47)
at sbt.ConflictWarning$.apply(ConflictWarning.scala:30)
at sbt.Classpaths$$anonfun$60.apply(Defaults.scala:1090)
at sbt.Classpaths$$anonfun$60.apply(Defaults.scala:1090)
at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)
at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:42)
at sbt.std.Transform$$anon$4.work(System.scala:64)
at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:237)
at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:237)
at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:18)
at sbt.Execute.work(Execute.scala:244)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:237)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:237)
at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:160)
at sbt.CompletionService$$anon$2.call(CompletionService.scala:30)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
error Conflicting cross-version suffixes in: io.spray:spray-httpx, io.spray:spray-can, io.spray:spray-util, io.spray:spray-io, io.spray:spray-client, io.spray:spray-http
[error] Total time: 1 s, completed Jan 20, 2016 3:47:01 PM

Any pointers on how to get oti-geotrellis running ?