diff --git a/build.sh b/build.sh
index ad0e6b76b9..a07314618f 100755
--- a/build.sh
+++ b/build.sh
@@ -117,6 +117,7 @@ function build_clean {
     echo "Cleaning build directories..."
     rm -Rf out
     rm -Rf android/filament-android/build
+    rm -Rf android/filament-android/.externalNativeBuild
 }
 
 function generate_toolchain {