diff --git a/povray_wasm/Dockerfile b/povray_wasm/Dockerfile
index e897675..03bf0eb 100644
--- a/povray_wasm/Dockerfile
+++ b/povray_wasm/Dockerfile
@@ -16,7 +16,7 @@ RUN cd /opt && wget https://github.com/boostorg/boost/archive/refs/tags/boost-1.
 RUN cd /opt && tar -xf boost-1.37.0.tar.gz
 
 RUN mkdir -p /opt/libboost
-
+RUN cd /opt && ls
 RUN cd /opt/boost-1.37.0 && emconfigure ./configure --prefix=/opt/libboost
 
 RUN cd /opt/boost-1.37.0 && emmake make install -j CPPFLAGS="-s USE_PTHREADS=1" cxxflags="-s USE_PTHREADS=1"