diff --git a/sonic-slave-stretch/Dockerfile b/sonic-slave-stretch/Dockerfile
index 0e481d1d2f..eeac24ae84 100644
--- a/sonic-slave-stretch/Dockerfile
+++ b/sonic-slave-stretch/Dockerfile
@@ -256,6 +256,3 @@ RUN add-apt-repository \
 RUN apt-get update
 RUN apt-get install -y docker-ce=17.03.2~ce-0~debian-stretch
 RUN echo "DOCKER_OPTS=\"--experimental\"" >> /etc/default/docker
-
-# Cleanup build environment. Please leave this line at the end and add new changes above
-RUN dpkg --clear-avail; apt-get update
diff --git a/sonic-slave/Dockerfile b/sonic-slave/Dockerfile
index aad925a81a..abe43d9fe6 100644
--- a/sonic-slave/Dockerfile
+++ b/sonic-slave/Dockerfile
@@ -309,6 +309,3 @@ RUN add-apt-repository \
 RUN apt-get update
 RUN apt-get install -y docker-ce=17.03.2~ce-0~debian-jessie
 RUN echo "DOCKER_OPTS=\"--experimental --storage-driver=vfs\"" >> /etc/default/docker
-
-# Cleanup build environment. Please leave this line at the end and add new changes above
-RUN dpkg --clear-avail; apt-get update