<dependency>
<groupId>org.atnos</groupId>
<artifactId>eff-scalaz_sjs1_2.12</artifactId>
<version>5.21.0</version>
</dependency>
compile
|-- org.scala-lang:scala-library:2.12.15
|-- org.atnos:eff_sjs1_2.12:5.21.0
|-- org.scala-js:scalajs-library_2.12:1.7.1
|-- org.scalaz:scalaz-core_sjs1_2.12:7.3.5
|-- org.typelevel:cats-core_sjs1_2.12:2.6.1
test
|-- org.scala-js:scalajs-test-bridge_2.12:1.7.1
|-- org.specs2:specs2-core_sjs1_2.12:4.12.12
|-- org.specs2:specs2-matcher-extra_sjs1_2.12:4.12.12