Install base CMSSW release first in case of patch release

standalone/Dockerfile

@@ -40,7 +40,13 @@ RUN     wget -O /opt/cms/bootstrap.sh http://cmsrep.cern.ch/cmssw/repos/bootstra
           && tar -xzf master.tar.gz \
           && mv siteconf-master SITECONF; \
         fi \
-        && /opt/cms/common/cmspkg -a ${SCRAM_ARCH} install -y cms+cmssw+${CMSSW_VERSION%_p*} \
+        && if [[ $CMSSW_VERSION = *"patch"* ]]; \
+        then \
+          export BASE_VERSION=$(echo "${CMSSW_VERSION}"| cut -d '_' -f -4); \
+        else \
+          export BASE_VERSION=${CMSSW_VERSION}; \
+        fi \
+        && /opt/cms/common/cmspkg -a ${SCRAM_ARCH} install -y cms+cmssw+${BASE_VERSION} \
         && if [[ $CMSSW_VERSION = *"patch"* ]]; \
         then \
           /opt/cms/common/cmspkg -a ${SCRAM_ARCH} install -y cms+cmssw-patch+${CMSSW_VERSION}; \