<dependency>
<groupId>com.codecommit</groupId>
<artifactId>shims-effect_2.11</artifactId>
<version>1.5.0</version>
</dependency>
compile
|-- org.scala-lang:scala-library:2.11.12
|-- com.codecommit:shims_2.11:1.5.0
|-- org.typelevel:cats-effect_2.11:1.0.0
|-- org.scalaz:scalaz-concurrent_2.11:7.2.26
test
|-- org.specs2:specs2-core_2.11:4.1.2
|-- org.specs2:specs2-scalacheck_2.11:4.1.2
|-- org.scalacheck:scalacheck_2.11:1.13.5