+# For development and release candidate packages, the OS package has a "~dev"
+# or "~rc" suffix, but Python requires a ".dev" or "rc" suffix.
+#
+# Arvados-cwl-runner will be expecting the Python-compatible version string
+# when it tries to pull the Docker image, so we use that to tag the Docker
+# image.
+#
+# The --build-arg docker invocation arguments are expecting the OS package
+# version.
+python_sdk_version_os=$(echo -n $python_sdk_version | sed s/.dev/~dev/g | sed s/rc/~rc/g)
+cwl_runner_version_os=$(echo -n $cwl_runner_version | sed s/.dev/~dev/g | sed s/rc/~rc/g)
+