diff --git a/Docker/shellb3-cspp-himawari-satpy-py38.Dockerfile b/Docker/shellb3-cspp-himawari-satpy-py38.Dockerfile
index fcd0e4f94d73f73eb85d67b9a6d3bb47086ffaba..838079704104a63b4e2a029cfbd2f9b7bf7e8b1c 100644
--- a/Docker/shellb3-cspp-himawari-satpy-py38.Dockerfile
+++ b/Docker/shellb3-cspp-himawari-satpy-py38.Dockerfile
@@ -1,6 +1,7 @@
 # docker build . -f shellb3-cspp-himawari-satpy-py38.Dockerfile -t shellb3-cspp-himawari-satpy-py38:latest
 # docker run -e SHELLB3_ARCHIVE_DIR=/dock -it --rm -v $HOME/dock:/dock -w /opt/shellb3-cspp-py38/ShellB3 shellb3-cspp-himawari-satpy-py38 /bin/bash -l -c "unset LANG; bash shallbethree.sh bin_dist"
-FROM gitlab.ssec.wisc.edu:5555/cspp/buildbucket/shellb3/shellb3-centos7-gcc8-cspp-py38:rGIT87ffe253
+ARG BASE=gitlab.ssec.wisc.edu:5555/cspp/buildbucket/shellb3/shellb3-centos7-gcc8-cspp-py38:rGIT87ffe253
+FROM $BASE
 RUN curl -o /work/himawari-master.tar.bz2 -sS https://gitlab.ssec.wisc.edu/rayg/himawari/-/archive/master/himawari-master.tar.bz2 \
  && ShellB3/ShellB3/bin/pip3 install /work/himawari-master.tar.bz2 \
  && echo "himawari" >> ShellB3/ShellB3/trim