ScalaPB и шейдинг с SBT не работает

Question

Я пытаюсь заставить https://scalapb.github.io/">ScalaPB работать со Spark. Для этого мне нужно затенить мои буферы протокола в SBT, используя код, как показано ниже

assemblyShadeRules in assembly := Seq(
  ShadeRule.rename("com.google.protobuf.**" -> "shadeproto.@1").inAll
)

Это не работает внутри спарк-оболочки. На самом деле, это даже не работает в Scala REPL. Ниже воспроизведены мои ошибки в REPL.

Welcome to Scala 2.11.8 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_102).
Type in expressions for evaluation. Or try :help.

  scala> val x = zefr.commons.proto.Video.VideoProto.descriptor
error: missing or invalid dependency detected while loading class file 'VideoProto.class'.
Could not access term google in package com,
because it (or its dependencies) are missing. Check your build definition for
  missing or conflicting dependencies. (Re-run with `-Ylog-classpath` to see the problematic classpath.)
A full rebuild may help if 'VideoProto.class' was compiled against an incompatible version of com.
error: missing or invalid dependency detected while loading class file 'VideoProto.class'.
Could not access term protobuf in value com.google,
because it (or its dependencies) are missing. Check your build definition for
  missing or conflicting dependencies. (Re-run with `-Ylog-classpath` to see the problematic classpath.)
A full rebuild may help if 'VideoProto.class' was compiled against an incompatible version of com.google.
  error: missing or invalid dependency detected while loading class file 'GeneratedMessageCompanion.class'.
Could not access term google in package com,
because it (or its dependencies) are missing. Check your build definition for
  missing or conflicting dependencies. (Re-run with `-Ylog-classpath` to see the problematic classpath.)
A full rebuild may help if 'GeneratedMessageCompanion.class' was compiled against an incompatible version of com.
error: missing or invalid dependency detected while loading class file 'GeneratedMessageCompanion.class'.
Could not access term protobuf in value com.google,
because it (or its dependencies) are missing. Check your build definition for
  missing or conflicting dependencies. (Re-run with `-Ylog-classpath` to see the problematic classpath.)
A full rebuild may help if 'GeneratedMessageCompanion.class' was compiled against an incompatible version of com.google.
  error: missing or invalid dependency detected while loading class file 'VideoProto.class'.
Could not access term Descriptors in value com.protobuf,
because it (or its dependencies) are missing. Check your build definition for
  missing or conflicting dependencies. (Re-run with `-Ylog-classpath` to see the problematic classpath.)
A full rebuild may help if 'VideoProto.class' was compiled against an incompatible version of com.protobuf.
  error: missing or invalid dependency detected while loading class file 'VideoProto.class'.
Could not access term protobuf in value com.google,
because it (or its dependencies) are missing. Check your build definition for
  missing or conflicting dependencies. (Re-run with `-Ylog-classpath` to see the problematic classpath.)
A full rebuild may help if 'VideoProto.class' was compiled against an incompatible version of com.google.
  error: missing or invalid dependency detected while loading class file 'VideoProto.class'.
Could not access term google in package com,
because it (or its dependencies) are missing. Check your build definition for
  missing or conflicting dependencies. (Re-run with `-Ylog-classpath` to see the problematic classpath.)
A full rebuild may help if 'VideoProto.class' was compiled against an incompatible version of com.
error: missing or invalid dependency detected while loading class file 'VideoProto.class'.
Could not access type Descriptor in value com.Descriptors,
because it (or its dependencies) are missing. Check your build definition for
  missing or conflicting dependencies. (Re-run with `-Ylog-classpath` to see the problematic classpath.)
A full rebuild may help if 'VideoProto.class' was compiled against an incompatible version of com.Descriptors.

Вот полная копия моего файла build.sbt

scalaVersion := "2.11.8"
organization := "zefr.commons"
name := "commons-proto"


val nexus = "http://nexus.zefr.com/repository/maven"
resolvers ++= Seq(
  Resolver.sonatypeRepo("releases"),
  Resolver.sonatypeRepo("snapshots"),
  "Neuxs Snapshots" at s"$nexus-snapshots",
  "Neuxs Releases" at s"$nexus-releases"
)
conflictManager := ConflictManager.strict

PB.targets in Compile := Seq(
  scalapb.gen() -> (sourceManaged in Compile).value
)

assemblyShadeRules in assembly := Seq(
  ShadeRule.rename("com.google.protobuf.**" -> "shadeproto.@1").inAll
)

И проект /protos.sbt

addSbtPlugin("com.thesamet" % "sbt-protoc" % "0.99.3")

libraryDependencies += "com.trueaccord.scalapb" %% "compilerplugin" % "0.5.45-p3"

addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.14.3")

Может кто-нибудь, пожалуйста, помогите мне понять, что мне здесь не хватает?

Спасибо

РЕДАКТИРОВАТЬ

Чтобы увидеть, была ли это проблема, которую я представлял, я скачал этот проект и собрал его как есть, только изменив версию Scala на 2.11.8, и я получаю ту же ошибку.

scala> val x = com.example.protos.demo.Person.descriptor
error: missing or invalid dependency detected while loading class file 'Person.class'.
Could not access term google in package com,
because it (or its dependencies) are missing. Check your build definition for
  missing or conflicting dependencies. (Re-run with `-Ylog-classpath` to see the problematic classpath.)
A full rebuild may help if 'Person.class' was compiled against an incompatible version of com.
error: missing or invalid dependency detected while loading class file 'Person.class'.
Could not access term protobuf in value com.google,
because it (or its dependencies) are missing. Check your build definition for
  missing or conflicting dependencies. (Re-run with `-Ylog-classpath` to see the problematic classpath.)
A full rebuild may help if 'Person.class' was compiled against an incompatible version of com.google.
  error: missing or invalid dependency detected while loading class file 'GeneratedMessageCompanion.class'.
Could not access term google in package com,
because it (or its dependencies) are missing. Check your build definition for
  missing or conflicting dependencies. (Re-run with `-Ylog-classpath` to see the problematic classpath.)
A full rebuild may help if 'GeneratedMessageCompanion.class' was compiled against an incompatible version of com.
error: missing or invalid dependency detected while loading class file 'GeneratedMessageCompanion.class'.
Could not access term protobuf in value com.google,
because it (or its dependencies) are missing. Check your build definition for
  missing or conflicting dependencies. (Re-run with `-Ylog-classpath` to see the problematic classpath.)
A full rebuild may help if 'GeneratedMessageCompanion.class' was compiled against an incompatible version of com.google.
  error: missing or invalid dependency detected while loading class file 'Person.class'.
Could not access term Descriptors in value com.protobuf,
because it (or its dependencies) are missing. Check your build definition for
  missing or conflicting dependencies. (Re-run with `-Ylog-classpath` to see the problematic classpath.)
A full rebuild may help if 'Person.class' was compiled against an incompatible version of com.protobuf.
  error: missing or invalid dependency detected while loading class file 'Person.class'.
Could not access term protobuf in value com.google,
because it (or its dependencies) are missing. Check your build definition for
  missing or conflicting dependencies. (Re-run with `-Ylog-classpath` to see the problematic classpath.)
A full rebuild may help if 'Person.class' was compiled against an incompatible version of com.google.
  error: missing or invalid dependency detected while loading class file 'Person.class'.
Could not access term google in package com,
because it (or its dependencies) are missing. Check your build definition for
  missing or conflicting dependencies. (Re-run with `-Ylog-classpath` to see the problematic classpath.)
A full rebuild may help if 'Person.class' was compiled against an incompatible version of com.
error: missing or invalid dependency detected while loading class file 'Person.class'.
Could not access type Descriptor in value com.Descriptors,
because it (or its dependencies) are missing. Check your build definition for
  missing or conflicting dependencies. (Re-run with `-Ylog-classpath` to see the problematic classpath.)
A full rebuild may help if 'Person.class' was compiled against an incompatible version of com.Descriptors.