sbt ivy2: configuration 'master' not found from 'compile' - scala

Question

I am getting the following error when I build a library bp-kafka-bp2 that depends on library bp-bp2-componentized:
sbt.librarymanagement.ResolveException: unresolved dependency:
com.foo#bp-bp2-componentized_2.11;3.3.+: configuration not found in
com.foo#bp-bp2-componentized_2.11;3.3.0: 'master'. It was required
from com.foo#bp-kafka-bp2_2.11;3.10.1 compile
The unresolved library bp-bp2-componentized does in fact exist in ~/.ivy2/local and does not have a master configuration in its ivy.xml
My questions are:
Should the dependent library (bp-kafka-bp2) be looking for a master configuration of the (not really) missing library?
If it should not be looking for a master config, what can I do to make it stop doing so?
If it should be looking for a master config, how do I induce the build for the (not really) missing library to produce such a config?
I have tried this in sbt versions 1.1.5 and 1.2.1. I have deleted ~/.ivy2/local, ./ivy2/cache and ~/.sbt. I have also removed all the /target and project/target directories in the library I am building and done sbt clean
This library has built just fine for a year or two now. The only recent change I can think of is introducing 2.11 and 2.12 cross-compilation option -- which is not being exercised here, I'm just building 2.11 version on its own.
The direct dependency is declared in a multi-project build.sbt as
lazy val bp2 = (project in file("bp2")).
settings(commonSettings:_*).
settings(Seq(
name := "bp-kafka-bp2"
):_*).
settings(
libraryDependencies ++= Seq(
"org.scalatest" %% "scalatest" % ScalaTestVersion % "test",
"ch.qos.logback" % "logback-classic" % LogbackVersion % "test",
"com.foo" %% "bp-bp2-componentized" % Constellation.dependency("bp-bp2"),
"com.foo" %% "bp-akka-http" % Constellation.dependency("bp-akka")
)
).
dependsOn(reactiveComponentized)
where Constellation.dependency is just a function that looks up a version by name and turns it into a patch range:
object Constellation {
...
def dependency(name: String) : String = versions(name).split("\\.").dropRight(1).mkString(".") + ".+"
}
You can see from the error message that the version is being found and converted to 3.3.+ which is then resolved correctly to a 3.3.0 in the ivy cache. But then it insists on finding a master configuration which is not present.