diff --git a/src/main/scala/cloud/golem/GolemScalaPlugin.scala b/src/main/scala/cloud/golem/GolemScalaPlugin.scala
index a4697c0..c767358 100644
--- a/src/main/scala/cloud/golem/GolemScalaPlugin.scala
+++ b/src/main/scala/cloud/golem/GolemScalaPlugin.scala
@@ -6,6 +6,7 @@ import sbt.plugins.JvmPlugin
 
 object GolemScalaPlugin extends AutoPlugin {
   object autoImport {
+    lazy val golemScalaOutputDirectory = settingKey[File]("Output directory")
     lazy val golemScalaWitPath = settingKey[File]("Path to the wit file")
     lazy val golemScalaPackageName = settingKey[String]("Package name")
     lazy val witBindgen =
diff --git a/src/main/scala/cloud/golem/GolemScalaPluginInternal.scala b/src/main/scala/cloud/golem/GolemScalaPluginInternal.scala
index 108c60e..1aa3a27 100644
--- a/src/main/scala/cloud/golem/GolemScalaPluginInternal.scala
+++ b/src/main/scala/cloud/golem/GolemScalaPluginInternal.scala
@@ -14,6 +14,7 @@ private[golem] object GolemScalaPluginInternal {
 
   lazy val baseSettings: Seq[Setting[?]] =
     Def.settings(
+      golemScalaOutputDirectory := (ThisBuild / target).value / s"${(ThisBuild / moduleName).value}-opt",
       golemScalaWitPath := (ThisBuild / baseDirectory).value / "wit",
       golemScalaPackageName := "main",
       witBindgen := {