No longer able to install 2.13.1 with coursier

I just upgraded via coursier clobbered my scala 2.13.1 version. When I try to move back, I get the following:

https://repo1.maven.org/maven2/io/get-coursier/apps/maven-metadata.xml
  No new update since 2022-02-06 13:51:21
Exception in thread "main" coursier.error.ResolutionError$CantDownloadModule: Error downloading org.scala-lang:scala3-compiler_3:2.13.1
  not found: https://repo1.maven.org/maven2/org/scala-lang/scala3-compiler_3/2.13.1/scala3-compiler_3-2.13.1.pom
        at coursier.Resolve$.$anonfun$validate$1(Resolve.scala:329)
        at scala.collection.TraversableLike.$anonfun$map$1(TraversableLike.scala:285)
        at scala.collection.Iterator.foreach(Iterator.scala:943)
        at scala.collection.Iterator.foreach$(Iterator.scala:943)
        at scala.collection.AbstractIterator.foreach(Iterator.scala:1431)
        at scala.collection.IterableLike.foreach(IterableLike.scala:74)
        at scala.collection.IterableLike.foreach$(IterableLike.scala:73)
        at scala.collection.AbstractIterable.foreach(Iterable.scala:56)
        at scala.collection.TraversableLike.map(TraversableLike.scala:285)
        at scala.collection.TraversableLike.map$(TraversableLike.scala:278)
        at scala.collection.AbstractTraversable.map(Traversable.scala:108)
        at coursier.Resolve$.validate(Resolve.scala:327)
        at coursier.Resolve.validate0$1(Resolve.scala:115)
        at coursier.Resolve.$anonfun$ioWithConflicts0$4(Resolve.scala:161)
        at coursier.util.Task$.$anonfun$flatMap$extension$1(Task.scala:14)
        at coursier.util.Task$.$anonfun$flatMap$extension$1$adapted(Task.scala:14)
        at coursier.util.Task$.wrap(Task.scala:84)
        at coursier.util.Task$.$anonfun$flatMap$2(Task.scala:14)
        at scala.concurrent.Future.$anonfun$flatMap$1(Future.scala:307)
        at scala.concurrent.impl.Promise.$anonfun$transformWith$1(Promise.scala:41)
        at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:64)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base/java.lang.Thread.run(Thread.java:833)```

I ran into the same issue and fixed it by updating coursier itself (cs update cs).

I tried that, but for some reason, it didn’t work. In my case, I had installed cs via nix and I found that I had to uninstall and reinstall using the the standard jar installer. Now I’m good again. I don’t think it was nix, per se, that was my problem, but rather that home-manager wasn’t installing a late enough version.