1 files changed, 4 insertions, 0 deletions
diff --git a/build.sbt b/build.sbt
index 87556bc894..c23e5bf24b 100644
--- a/build.sbt
+++ b/build.sbt
@@ -363,6 +363,8 @@ lazy val library = configureAsSubproject(project)
         "-doc-root-content", (sourceDirectory in Compile).value + "/rootdoc.txt"
       )
     },
+    // macros in library+reflect are hard-wired to implementations with `FastTrack`.
+    incOptions := incOptions.value.withRecompileOnMacroDef(false),
     includeFilter in unmanagedResources in Compile := "*.tmpl" | "*.xml" | "*.js" | "*.css" | "rootdoc.txt",
     // Include *.txt files in source JAR:
     mappings in Compile in packageSrc ++= {
@@ -394,6 +396,8 @@ lazy val reflect = configureAsSubproject(project)
   .settings(
     name := "scala-reflect",
     description := "Scala Reflection Library",
+    // macros in library+reflect are hard-wired to implementations with `FastTrack`.
+    incOptions := incOptions.value.withRecompileOnMacroDef(false),
     Osgi.bundleName := "Scala Reflect",
     scalacOptions in Compile in doc ++= Seq(
       "-skip-packages", "scala.reflect.macros.internal:scala.reflect.internal:scala.reflect.io"