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@@ -34,10 +34,12 @@ RUN rm -f /usr/local/bin/ffprobe && ln -sf /usr/local/bin/ffprobe5-hevc-over-rtm
 ENV DEBIAN_FRONTEND=noninteractive
 
 # Note that git is very important for codecov to discover the .codecov.yml
-RUN apt update && \
-    apt install -y aptitude gdb gcc g++ make patch unzip python \
+# For https://github.com/google/sanitizers
+RUN apt-get update -y && \
+    apt-get install -y aptitude gdb gcc g++ make patch unzip python \
         autoconf automake libtool pkg-config liblzma-dev curl net-tools \
-        tcl
+        tcl libasan5 && \
+    apt-get clean && rm -rf /var/lib/apt/lists/*
 
 # To use if in RUN, see https://github.com/moby/moby/issues/7281#issuecomment-389440503
 # Note that only exists issue like "/bin/sh: 1: [[: not found" for Ubuntu20, no such problem in CentOS7.
@@ -47,9 +49,6 @@ SHELL ["/bin/bash", "-c"]
 # see https://stackoverflow.com/a/46805870/17679565
 RUN hash -r && which cmake && cmake --version
 
-# For https://github.com/google/sanitizers
-RUN apt install -y libasan5
-
 # Install cherrypy for HTTP hooks.
 #ADD CherryPy-3.2.4.tar.gz2 /tmp
 #RUN cd /tmp/CherryPy-3.2.4 && python setup.py install
@@ -71,14 +70,12 @@ ADD googletest-release-1.11.0.tar.gz /usr/local
 RUN ln -sf /usr/local/googletest-release-1.11.0/googletest /usr/local/gtest
 
 # Install 32bits adapter for crossbuild.
-RUN if [[ $TARGETARCH != 'arm' && $TARGETARCH != 'arm64' ]]; then \
-        apt-get -y install lib32z1-dev; \
-    fi
-
 # For cross-build: https://github.com/ossrs/srs/wiki/v4_EN_SrsLinuxArm#ubuntu-cross-build-srs
 RUN if [[ $TARGETARCH != 'arm' && $TARGETARCH != 'arm64' ]]; then \
-        apt-get install -y gcc-arm-linux-gnueabihf g++-arm-linux-gnueabihf \
-            gcc-aarch64-linux-gnu g++-aarch64-linux-gnu; \
+        apt-get update -y && \
+        apt-get install -y lib32z1-dev gcc-arm-linux-gnueabihf g++-arm-linux-gnueabihf \
+            gcc-aarch64-linux-gnu g++-aarch64-linux-gnu && \
+        apt-get clean && rm -rf /var/lib/apt/lists/*; \
     fi
 
 # Update the mirror from aliyun, @see https://segmentfault.com/a/1190000022619136