Play生产环境打包时Scala版本依赖警告问题咨询

Hey there, let's tackle that annoying version conflict warning you're getting when building your Play production environment with dist. Here's a step-by-step solution:

1. Add the forced Scala version override to your build.sbt #

The warning already gives you the exact line you need—just add this snippet to your build.sbt file, right alongside your existing scalaVersion := "2.11.12" line:

ivyScala := ivyScala.value map { _.copy(overrideScalaVersion = true) }

This tells SBT to ignore any Scala version specified by your dependencies and strictly use the 2.11.12 version you've defined.

2. Verify the fix with the evicted command #

To make sure the conflict is resolved, run this command in your SBT shell:

evicted

This will show you a detailed breakdown of all dependency version evictions. You should no longer see the warning about org.scala-lang:scala-compiler being updated from 2.11.0 to 2.11.8—instead, it should confirm that all Scala-related dependencies are aligned with your specified 2.11.12 version.

3. Optional: Double-check your dependencies (if issues persist) #

If you still run into problems after adding the override, it's worth checking if any of your dependencies don't have a compatible build for Scala 2.11.12. You can:

• Explicitly exclude conflicting Scala compiler/library dependencies from specific libraries using SBT's exclude method (e.g., libraryDependencies += "some.group" % "some-lib" % "1.0" exclude("org.scala-lang", "scala-compiler"))
• Look for updated versions of your dependencies that explicitly support Scala 2.11.12

That should get rid of that warning for good when you run dist next time!

内容的提问来源于stack exchange，提问作者ps0604