diff --git a/Dockerfile b/Dockerfile
index 23ec90c..1dd7b99 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -14,7 +14,8 @@ ARG ARTIFACT_LOCATION="https://download.ledgersmb.org/f/$LSMB_DL_DIR/$LSMB_VERSI
 # Install Locale::Codes Locale::Country Locale::Language from CPAN to suppress
 # deprecation-as-core-module warning
 
-RUN echo -n "APT::Install-Recommends \"0\";\nAPT::Install-Suggests \"0\";\n" >> /etc/apt/apt.conf && \
+RUN set -x ; \
+  echo -n "APT::Install-Recommends \"0\";\nAPT::Install-Suggests \"0\";\n" >> /etc/apt/apt.conf && \
   mkdir -p /usr/share/man/man1/ && \
   mkdir -p /usr/share/man/man2/ && \
   mkdir -p /usr/share/man/man3/ && \