Unresolved dependencies: cc.redberry#rings.scaladsl;2.2: not found

[tueda]

README and Quick Tour say one needs to add the following dependence to build.sbt:

libraryDependencies += "cc.redberry" % "rings.scaladsl" % "2.2"

but should the first % be %%? Like:

libraryDependencies += "cc.redberry" %% "rings.scaladsl" % "2.2"

Otherwise, I get an error like

[warn]  module not found: cc.redberry#rings.scaladsl;2.2
[warn] ==== local: tried
[warn]   /user/tueda/.ivy2/local/cc.redberry/rings.scaladsl/2.2/ivys/ivy.xml
[warn] ==== public: tried
[warn]   https://repo1.maven.org/maven2/cc/redberry/rings.scaladsl/2.2/rings.scaladsl-2.2.pom
[warn] ==== local-preloaded-ivy: tried
[warn]   /user/tueda/.sbt/preloaded/cc.redberry/rings.scaladsl/2.2/ivys/ivy.xml
[warn] ==== local-preloaded: tried
[warn]   file:////user/tueda/.sbt/preloaded/cc/redberry/rings.scaladsl/2.2/rings.scaladsl-2.2.pom
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]  ::          UNRESOLVED DEPENDENCIES         ::
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]  :: cc.redberry#rings.scaladsl;2.2: not found
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn] 
[warn]  Note: Unresolved dependencies path:
[warn]          cc.redberry:rings.scaladsl:2.2 (/user/tueda/Desktop/test-rings/build.sbt#L4-5)
[warn]            +- test:test_2.12:0.1.0

[PoslavskySV]

You are completely right. Just fixed this. Thanks!