diff --git a/ddprof-lib/benchmarks/build.gradle b/ddprof-lib/benchmarks/build.gradle
index c6bd1db5c..fd3ded88a 100644
--- a/ddprof-lib/benchmarks/build.gradle
+++ b/ddprof-lib/benchmarks/build.gradle
@@ -17,7 +17,10 @@ application {
 
 // Include the main library headers
 tasks.withType(CppCompile).configureEach {
+  dependsOn ':ddprof-lib:copyUpstreamFiles'
+
   includes file('../src/main/cpp').toString()
+  includes file('../src/main/cpp-external').toString()
 }
 
 // Add a task to run the benchmark