diff --git a/build.sbt b/build.sbt
index 60a9b68..2095311 100644
--- a/build.sbt
+++ b/build.sbt
@@ -105,7 +105,6 @@ lazy val `sphere-json-3` = project
   .in(file("./json/json-3"))
   .settings(scalaVersion := scala3)
   .settings(standardSettings: _*)
-  .settings(Fmpp.settings: _*)
   .dependsOn(`sphere-util-3`)
 
 // Scala 2 modules
@@ -126,12 +125,6 @@ lazy val `sphere-json-derivation` = project
   .settings(Fmpp.settings: _*)
   .dependsOn(`sphere-json-core`)
 
-lazy val `sphere-json-derivation-scala-3` = project
-  .settings(scalaVersion := scala3)
-  .in(file("./json/json-derivation-scala-3"))
-  .settings(standardSettings: _*)
-  .dependsOn(`sphere-json-core`)
-
 lazy val `sphere-json` = project
   .in(file("./json"))
   .settings(standardSettings: _*)