From 729c575668e02afc1066bbef5af765fba234bae4 Mon Sep 17 00:00:00 2001
From: Jamie Thompson <bishbashboshjt@gmail.com>
Date: Wed, 21 Aug 2024 12:32:00 +0200
Subject: [PATCH] properly splice package prefix for nested multi builds

---
 runner/src/mill/runner/MillBuildRootModule.scala | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/runner/src/mill/runner/MillBuildRootModule.scala b/runner/src/mill/runner/MillBuildRootModule.scala
index 8231e513575..b8dbc6aed0c 100644
--- a/runner/src/mill/runner/MillBuildRootModule.scala
+++ b/runner/src/mill/runner/MillBuildRootModule.scala
@@ -365,6 +365,7 @@ object MillBuildRootModule {
     val pkgLine = pkg.map(p => "package " + backtickWrap(p)).mkString("\n")
 
     if (isBuildOrModuleSc) {
+      val pkgPrefix = if (pkg.isEmpty) "`<empty>`" else pkg.map(backtickWrap).mkString(".")
       s"""$pkgLine
          |
          |import _root_.mill.runner.MillBuildRootModule
@@ -383,7 +384,7 @@ object MillBuildRootModule {
          |  )
          |}
          |import ${backtickWrap(miscInfoName)}.{millBuildRootModuleInfo, millBaseModuleInfo}
-         |package object ${backtickWrap(name)} extends _root_.`<empty>`.${backtickWrap(name + "_")}
+         |package object ${backtickWrap(name)} extends _root_.$pkgPrefix.${backtickWrap(name + "_")}
          |import ${backtickWrap(name)}._
          |class ${backtickWrap(name + "_")} extends $superClass {
          |