Can't build (missing dependencies)

[unoexperto]

I'm not able to build the project. I get following errors

[warn] 	::::::::::::::::::::::::::::::::::::::::::::::
[warn] 	::          UNRESOLVED DEPENDENCIES         ::
[warn] 	::::::::::::::::::::::::::::::::::::::::::::::
[warn] 	:: com.android.support#recyclerview-v7;21.0.0: not found
[warn] 	:: com.android.support#support-annotations;20.0.0: not found
[warn] 	::::::::::::::::::::::::::::::::::::::::::::::
[warn] 
[warn] 	Note: Unresolved dependencies path:
[warn] 		com.android.support:recyclerview-v7:21.0.0
[warn] 		  +- com.melnykov:floatingactionbutton:1.0.6 (/home/expert/work/sideprojects/lcamera/build.sbt#L10-17)
[warn] 		  +- lcamera:lcamera_2.11:0.1-SNAPSHOT
[warn] 		com.android.support:support-annotations:20.0.0
[warn] 		  +- com.melnykov:floatingactionbutton:1.0.6 (/home/expert/work/sideprojects/lcamera/build.sbt#L10-17)
[warn] 		  +- lcamera:lcamera_2.11:0.1-SNAPSHOT
sbt.ResolveException: unresolved dependency: com.android.support#recyclerview-v7;21.0.0: not found
unresolved dependency: com.android.support#support-annotations;20.0.0: not found
	at sbt.IvyActions$.sbt$IvyActions$$resolve(IvyActions.scala:313)
	at sbt.IvyActions$$anonfun$updateEither$1.apply(IvyActions.scala:191)
	at sbt.IvyActions$$anonfun$updateEither$1.apply(IvyActions.scala:168)
	at sbt.IvySbt$Module$$anonfun$withModule$1.apply(Ivy.scala:156)
	at sbt.IvySbt$Module$$anonfun$withModule$1.apply(Ivy.scala:156)
	at sbt.IvySbt$$anonfun$withIvy$1.apply(Ivy.scala:133)
	at sbt.IvySbt.sbt$IvySbt$$action$1(Ivy.scala:57)
	at sbt.IvySbt$$anon$4.call(Ivy.scala:65)
	at xsbt.boot.Locks$GlobalLock.withChannel$1(Locks.scala:93)
	at xsbt.boot.Locks$GlobalLock.xsbt$boot$Locks$GlobalLock$$withChannelRetries$1(Locks.scala:78)
	at xsbt.boot.Locks$GlobalLock$$anonfun$withFileLock$1.apply(Locks.scala:97)
	at xsbt.boot.Using$.withResource(Using.scala:10)
	at xsbt.boot.Using$.apply(Using.scala:9)
	at xsbt.boot.Locks$GlobalLock.ignoringDeadlockAvoided(Locks.scala:58)
	at xsbt.boot.Locks$GlobalLock.withLock(Locks.scala:48)
	at xsbt.boot.Locks$.apply0(Locks.scala:31)
	at xsbt.boot.Locks$.apply(Locks.scala:28)
	at sbt.IvySbt.withDefaultLogger(Ivy.scala:65)
	at sbt.IvySbt.withIvy(Ivy.scala:128)
	at sbt.IvySbt.withIvy(Ivy.scala:125)
	at sbt.IvySbt$Module.withModule(Ivy.scala:156)
	at sbt.IvyActions$.updateEither(IvyActions.scala:168)
	at sbt.Classpaths$$anonfun$sbt$Classpaths$$work$1$1.apply(Defaults.scala:1439)
	at sbt.Classpaths$$anonfun$sbt$Classpaths$$work$1$1.apply(Defaults.scala:1435)
	at sbt.Classpaths$$anonfun$doWork$1$1$$anonfun$90.apply(Defaults.scala:1470)
	at sbt.Classpaths$$anonfun$doWork$1$1$$anonfun$90.apply(Defaults.scala:1468)
	at sbt.Tracked$$anonfun$lastOutput$1.apply(Tracked.scala:37)
	at sbt.Classpaths$$anonfun$doWork$1$1.apply(Defaults.scala:1473)
	at sbt.Classpaths$$anonfun$doWork$1$1.apply(Defaults.scala:1467)
	at sbt.Tracked$$anonfun$inputChanged$1.apply(Tracked.scala:60)
	at sbt.Classpaths$.cachedUpdate(Defaults.scala:1490)
	at sbt.Classpaths$$anonfun$updateTask$1.apply(Defaults.scala:1417)
	at sbt.Classpaths$$anonfun$updateTask$1.apply(Defaults.scala:1369)
	at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)
	at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:40)
	at sbt.std.Transform$$anon$4.work(System.scala:63)
	at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:228)
	at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:228)
	at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:17)
	at sbt.Execute.work(Execute.scala:237)
	at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:228)
	at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:228)
	at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:159)
	at sbt.CompletionService$$anon$2.call(CompletionService.scala:28)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
[error] (*:update) sbt.ResolveException: unresolved dependency: com.android.support#recyclerview-v7;21.0.0: not found
[error] unresolved dependency: com.android.support#support-annotations;20.0.0: not found
[error] Total time: 1 s, completed Jan 2, 2017 9:00:10 PM

What should I do ?

[PkmX]

I think this is due to outdated dependencies. I have a local branch that compiles with the latest versions and works with API level 24 (Android N 7.0). I think I should clean up the branch and merge/push it to master some time later.