diff --git a/sbt-iw-plugin-presets/src/main/scala/works/iterative/sbt/IWPluginPresets.scala b/sbt-iw-plugin-presets/src/main/scala/works/iterative/sbt/IWPluginPresets.scala
index f54e37d..46024f2 100644
--- a/sbt-iw-plugin-presets/src/main/scala/works/iterative/sbt/IWPluginPresets.scala
+++ b/sbt-iw-plugin-presets/src/main/scala/works/iterative/sbt/IWPluginPresets.scala
@@ -46,11 +46,14 @@
       evictionErrorLevel := Level.Warn,
       addScalaJS,
       addScalaJSCrossproject,
-      addSbtScalaJSMap,
       addTzdb,
       addLocales,
       addScalablyTypedConverter
-    )
+    ) ++ (if (file(".git").isFile) { // only add sbt-scala-js-map if we're in a git repo
+            Seq(addSbtScalaJSMap)
+          } else {
+            Seq.empty
+          })
     val addLagom: Def.Setting[_] =
       addSbtPlugin("com.lightbend.lagom" % "lagom-sbt-plugin" % "1.6.5")
     val addPlay: Def.Setting[_] =