diff --git a/indigo-plugin/indigo-plugin/src/indigoplugin/core/IndigoBuild.scala b/indigo-plugin/indigo-plugin/src/indigoplugin/core/IndigoBuild.scala
index 24a75f485..472d5e73a 100644
--- a/indigo-plugin/indigo-plugin/src/indigoplugin/core/IndigoBuild.scala
+++ b/indigo-plugin/indigo-plugin/src/indigoplugin/core/IndigoBuild.scala
@@ -147,6 +147,8 @@ object IndigoBuild {
     def copyOne(p: Path): java.nio.file.Path = {
       val target = to / p.relativeTo(from)
 
+      os.makeDir.all(target)
+
       java.nio.file.Files.copy(
         p.wrapped,
         target.wrapped,
diff --git a/indigo-plugin/indigo-plugin/test/src/indigoplugin/core/AcceptanceTests.scala b/indigo-plugin/indigo-plugin/test/src/indigoplugin/core/AcceptanceTests.scala
index 385914347..af36b1a69 100644
--- a/indigo-plugin/indigo-plugin/test/src/indigoplugin/core/AcceptanceTests.scala
+++ b/indigo-plugin/indigo-plugin/test/src/indigoplugin/core/AcceptanceTests.scala
@@ -10,7 +10,7 @@ class AcceptanceTests extends munit.FunSuite {
 
   override def beforeAll(): Unit = {
     if (os.exists(targetDir)) {
-      os.remove(target = targetDir, checkExists = true)
+      os.remove.all(target = targetDir)
     }
 
     os.makeDir.all(targetDir)
@@ -19,16 +19,37 @@ class AcceptanceTests extends munit.FunSuite {
   val indigoAssets =
     IndigoAssets(
       gameAssetsDirectory = sourceDir,
-      include = { case _ => false },
-      exclude = { case _ => false }
+      include = {
+        case p if p.endsWith(os.RelPath("taken.txt"))      => true
+        case p if p.toString.matches("(.*)also-taken.txt") => true
+        case _                                             => false
+      },
+      exclude = {
+        case p if p.startsWith(os.RelPath("ignored-folder")) => true
+        case p if p.startsWith(os.RelPath("mixed"))          => true
+        case _                                               => false
+      }
     )
 
   test("Copy assets and assert expected output files") {
 
     IndigoBuild.copyAssets(indigoAssets, targetDir)
 
+    // Basics
     assert(os.exists(targetDir))
     assert(os.exists(targetDir / "foo.txt"))
+    assert(os.exists(targetDir / "data" / "stats.csv"))
+
+    // Ignored folder
+    assert(!os.exists(targetDir / "ignored-folder"))
+    assert(!os.exists(targetDir / "ignored-folder" / "ignored-file.txt"))
+
+    // Generally excluded, but some taken.
+    assert(os.exists(targetDir / "mixed"))
+    assert(!os.exists(targetDir / "mixed" / "ignored-file.txt"))
+    assert(os.exists(targetDir / "mixed" / "taken.txt"))
+    assert(os.exists(targetDir / "mixed" / "also-taken.txt"))
+
   }
 
 }
diff --git a/indigo-plugin/test-assets/data/stats.csv b/indigo-plugin/test-assets/data/stats.csv
new file mode 100644
index 000000000..e0b053e51
--- /dev/null
+++ b/indigo-plugin/test-assets/data/stats.csv
@@ -0,0 +1,5 @@
+name,level,bonus
+intelligence,2,4
+strength,10,0
+fortitude,4,1
+
diff --git a/indigo-plugin/test-assets/ignored-folder/ignored-file.txt b/indigo-plugin/test-assets/ignored-folder/ignored-file.txt
new file mode 100644
index 000000000..32344b008
--- /dev/null
+++ b/indigo-plugin/test-assets/ignored-folder/ignored-file.txt
@@ -0,0 +1 @@
+This file should not be copied over.
diff --git a/indigo-plugin/test-assets/mixed/also-taken.txt b/indigo-plugin/test-assets/mixed/also-taken.txt
new file mode 100644
index 000000000..1d7b8eb22
--- /dev/null
+++ b/indigo-plugin/test-assets/mixed/also-taken.txt
@@ -0,0 +1 @@
+This file should be copied over.
diff --git a/indigo-plugin/test-assets/mixed/ignored-file.txt b/indigo-plugin/test-assets/mixed/ignored-file.txt
new file mode 100644
index 000000000..32344b008
--- /dev/null
+++ b/indigo-plugin/test-assets/mixed/ignored-file.txt
@@ -0,0 +1 @@
+This file should not be copied over.
diff --git a/indigo-plugin/test-assets/mixed/taken.txt b/indigo-plugin/test-assets/mixed/taken.txt
new file mode 100644
index 000000000..1d7b8eb22
--- /dev/null
+++ b/indigo-plugin/test-assets/mixed/taken.txt
@@ -0,0 +1 @@
+This file should be copied over.