Fix non-canonical path in compiler options

Author: adpi2

Diff for: project/Build.scala

@@ -1116,7 +1116,7 @@ object Build {
     libraryDependencies += "org.scala-lang" % "scala-library" % stdlibVersion,
     (Compile / scalacOptions) ++= Seq(
       // Needed so that the library sources are visible when `dotty.tools.dotc.core.Definitions#init` is called
-      "-sourcepath", (Compile / sourceDirectories).value.map(_.getAbsolutePath).distinct.mkString(File.pathSeparator),
+      "-sourcepath", (Compile / sourceDirectories).value.map(_.getCanonicalPath).distinct.mkString(File.pathSeparator),
       "-Yexplicit-nulls",
     ),
     (Compile / doc / scalacOptions) ++= ScaladocConfigs.DefaultGenerationSettings.value.settings,