diff --git a/main/src/main/scala/sbt/internal/Resolve.scala b/main/src/main/scala/sbt/internal/Resolve.scala
index 7e3fe0676..761ba5dd3 100644
--- a/main/src/main/scala/sbt/internal/Resolve.scala
+++ b/main/src/main/scala/sbt/internal/Resolve.scala
@@ -15,19 +15,19 @@ object Resolve {
       index: BuildUtil[_],
       current: ScopeAxis[Reference],
       key: AttributeKey[_],
-      mask: ScopeMask
+      mask: ScopeMask,
   ): Scope => Scope = {
-    val rs =
-      resolveProject(current, mask) _ ::
-        resolveExtra(mask) _ ::
-        resolveTask(mask) _ ::
-        resolveConfig(index, key, mask) _ ::
-        Nil
+    val rs = (
+      resolveProject(current, mask) _
+        :: resolveExtra(mask) _
+        :: resolveTask(mask) _
+        :: resolveConfig(index, key, mask) _
+        :: Nil
+    )
     scope =>
-      (scope /: rs) { (s, f) =>
-        f(s)
-      }
+      rs.foldLeft(scope)((s, f) => f(s))
   }
+
   def resolveTask(mask: ScopeMask)(scope: Scope): Scope =
     if (mask.task) scope
     else scope.copy(task = Zero)
@@ -41,17 +41,16 @@ object Resolve {
     else scope.copy(extra = Zero)
 
   def resolveConfig[P](index: BuildUtil[P], key: AttributeKey[_], mask: ScopeMask)(
-      scope: Scope
+      scope: Scope,
   ): Scope =
     if (mask.config)
       scope
     else {
       val (resolvedRef, proj) = scope.project match {
+        case Zero | This => (None, index.rootProject(index.root))
         case Select(ref) =>
           val r = index resolveRef ref
           (Some(r), index.projectFor(r))
-        case Zero | This =>
-          (None, index.rootProject(index.root))
       }
       val task = scope.task.toOption
       val keyIndex = index.keyIndex