diff --git a/4.0/Dockerfile b/4.0/Dockerfile
index 2f439dd..9fcfce4 100644
--- a/4.0/Dockerfile
+++ b/4.0/Dockerfile
@@ -140,7 +140,7 @@ RUN set -eux; \
 	rm -rf /usr/src/qemu; \
 	\
 	apt-mark auto '.*' > /dev/null; \
-	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark; \
+	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark > /dev/null; \
 	find /usr/local -type f -executable -exec ldd '{}' ';' \
 		| awk '/=>/ { print $(NF-1) }' \
 		| sort -u \
diff --git a/4.1/Dockerfile b/4.1/Dockerfile
index 19643b6..178928c 100644
--- a/4.1/Dockerfile
+++ b/4.1/Dockerfile
@@ -140,7 +140,7 @@ RUN set -eux; \
 	rm -rf /usr/src/qemu; \
 	\
 	apt-mark auto '.*' > /dev/null; \
-	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark; \
+	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark > /dev/null; \
 	find /usr/local -type f -executable -exec ldd '{}' ';' \
 		| awk '/=>/ { print $(NF-1) }' \
 		| sort -u \
diff --git a/4.2/Dockerfile b/4.2/Dockerfile
index afe23de..6b284a1 100644
--- a/4.2/Dockerfile
+++ b/4.2/Dockerfile
@@ -140,7 +140,7 @@ RUN set -eux; \
 	rm -rf /usr/src/qemu; \
 	\
 	apt-mark auto '.*' > /dev/null; \
-	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark; \
+	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark > /dev/null; \
 	find /usr/local -type f -executable -exec ldd '{}' ';' \
 		| awk '/=>/ { print $(NF-1) }' \
 		| sort -u \
diff --git a/5.0/Dockerfile b/5.0/Dockerfile
index 0c76cbe..fcbf136 100644
--- a/5.0/Dockerfile
+++ b/5.0/Dockerfile
@@ -140,7 +140,7 @@ RUN set -eux; \
 	rm -rf /usr/src/qemu; \
 	\
 	apt-mark auto '.*' > /dev/null; \
-	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark; \
+	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark > /dev/null; \
 	find /usr/local -type f -executable -exec ldd '{}' ';' \
 		| awk '/=>/ { print $(NF-1) }' \
 		| sort -u \
diff --git a/Dockerfile.template b/Dockerfile.template
index ab35ebc..67cbd48 100644
--- a/Dockerfile.template
+++ b/Dockerfile.template
@@ -140,7 +140,7 @@ RUN set -eux; \
 	rm -rf /usr/src/qemu; \
 	\
 	apt-mark auto '.*' > /dev/null; \
-	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark; \
+	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark > /dev/null; \
 	find /usr/local -type f -executable -exec ldd '{}' ';' \
 		| awk '/=>/ { print $(NF-1) }' \
 		| sort -u \