diff --git a/sbin/build.sh b/sbin/build.sh
index 416ba4270..9f591426b 100755
--- a/sbin/build.sh
+++ b/sbin/build.sh
@@ -833,10 +833,10 @@ fixJavaHomeUnderDocker() {
 
 addInfoToReleaseFile(){
   # Extra information is added to the release file here
-  cd ${BUILD_CONFIG[JDK_PATH]}
+  cd $PRODUCT_HOME
+  JAVA_LOC="$PRODUCT_HOME/bin/java"
   addImplementor
   addBuildSHA
-  addBuildNumber
   addFullVersion
   addBuildOS
   addJVMVariant
@@ -844,25 +844,18 @@ addInfoToReleaseFile(){
   # OpenJ9 specific options
   if [ "${BUILD_CONFIG[BUILD_VARIANT]}" == "${BUILD_VARIANT_OPENJ9}" ]; then
     addHeapSize
+    addJ9Tag
   fi
 }
 
-addBuildNumber(){
-  # If variable is populated add it to the release file
-  if [[ ${BUILD_CONFIG[OPENJDK_BUILD_NUMBER]} ]]; then
-    echo -e BUILD_NUMBER=\"${BUILD_CONFIG[OPENJDK_BUILD_NUMBER]}\" >> release
-  fi
-}
-
-addHeapSize(){
-  local jdkPath=${BUILD_CONFIG[JDK_PATH]}
-  if [ "${BUILD_CONFIG[OPENJDK_CORE_VERSION]}" == "${JDK8_CORE_VERSION}" ]; then
-    if [ -d $jdkPath/jre/lib/amd64/compressedrefs ] || [ -d $jdkPath/lib/compressedrefs ]; then
-      echo -e HEAP_SIZE=\"Standard\" >> release
-    else # Large heap has the folder /jre/lib/amd64/default or /lib/default
-      echo -e HEAP_SIZE=\"Large\" >> release
-    fi
+addHeapSize(){ # Adds an identifier for heap size on OpenJ9 builds
+  local heapSize=""
+  if [[ $($JAVA_LOC -version 2>&1 | grep 'Compressed References') ]]; then
+    heapSize="Standard"
+  else
+    heapSize="Large"
   fi
+  echo -e HEAP_SIZE=\"$heapSize\" >> release
 }
 
 addImplementor(){
@@ -871,54 +864,52 @@ addImplementor(){
   fi  
 }
 
-addJVMVersion(){
-  local javaLoc="${BUILD_CONFIG[JDK_PATH]}/bin/java"
-  if [ "${BUILD_CONFIG[OS_KERNEL_NAME]}" == "cygwin" ]; then
-    javaLoc="${BUILD_CONFIG[JDK_PATH]}/bin/java.exe"
-  elif [ "${BUILD_CONFIG[OS_KERNEL_NAME]}" == "darwin" ]; then
-    javaLoc="${BUILD_CONFIG[JDK_PATH]}/Contents/Home/bin/java"
-  fi
-  local jvmVersion = $($javaLoc -XshowSettings:properties -version 2>&1 | grep 'java.vm.version' | sed 's/^.*= //')
+addJVMVersion(){ # Adds the JVM version i.e. openj9-0.21.0
+  local jvmVersion=$($JAVA_LOC -XshowSettings:properties -version 2>&1 | grep 'java.vm.version' | sed 's/^.*= //' | tr -d '\r')
   echo -e JVM_VERSION=\"$jvmVersion\" >> release
 }
 
-addFullVersion(){
-      echo -e FULL_VERSION=\"${BUILD_CONFIG[TAG]}\" >> release
+addFullVersion(){ # Adds the full version including build number i.e. 11.0.9+5-202009040847
+  local fullVer=$($JAVA_LOC -XshowSettings:properties -version 2>&1 | grep 'java.runtime.version' | sed 's/^.*= //' | tr -d '\r')
+  echo -e FULL_VERSION=\"$fullVer\" >> release
 }
 
 addJVMVariant(){
-  local jvmName=""
-  if [ "${BUILD_CONFIG[BUILD_VARIANT]}" == "${BUILD_VARIANT_OPENJ9}" ]; then
-    jvmName="Openj9";
-  elif [ "${BUILD_CONFIG[BUILD_VARIANT]}" == "${BUILD_VARIANT_CORRETTO}" ]; then
-    jvmName="Corretto";
-  elif [ "${BUILD_CONFIG[BUILD_VARIANT]}" == "${BUILD_VARIANT_HOTSPOT}" ]; then
-    jvmName="Hotspot";
-  fi
-  echo -e JVM_VARIANT=\"$jvmName\" >> release
+  echo -e JVM_VARIANT=\"${BUILD_CONFIG[BUILD_VARIANT]^}\" >> release
 }
 
-addBuildSHA(){
+addBuildSHA(){ # git SHA of the build repository i.e. openjdk-build
   local buildSHA=$(git -C ${BUILD_CONFIG[WORKSPACE_DIR]} rev-parse --short HEAD)
-  echo -e BUILD_SOURCE=\"$buildSHA\" >> release
+  echo -e BUILD_SOURCE=\"git:$buildSHA\" >> release
 }
 
 addBuildOS(){
-  local buildOS=""
-  local buildVer=""
-  if [ "${BUILD_CONFIG[OS_KERNEL_NAME]}" == "cygwin" ]; then
-    buildOS=$(systeminfo | sed -n 's/^OS Name:[[:blank:]]*//p')
-    buildVer=$(systeminfo | sed -n 's/^OS Version:[[:blank:]]*//p')
-  elif [ "${BUILD_CONFIG[OS_KERNEL_NAME]}" == "darwin" ]; then
+  local buildOS="Unknown"
+  local buildVer="Unknown"
+  if [ "${BUILD_CONFIG[OS_KERNEL_NAME]}" == "darwin" ]; then
     buildOS=$(sw_vers | sed -n 's/^ProductName:[[:blank:]]*//p')
     buildVer=$(sw_vers | tail -n 2 | awk '{print $2}')
   elif [ "${BUILD_CONFIG[OS_KERNEL_NAME]}" == "linux" ]; then
     buildOS=$(uname -s)
     buildVer=$(uname -r)
+  else # Fall back to java properties OS/Version info
+    buildOS=$($JAVA_LOC -XshowSettings:properties -version 2>&1 | grep 'os.name' | sed 's/^.*= //' | tr -d '\r')
+    buildVer=$($JAVA_LOC -XshowSettings:properties -version 2>&1 | grep 'os.version' | sed 's/^.*= //' | tr -d '\r')
   fi
   echo -e BUILD_INFO=\"OS: $buildOS Version: $buildVer\" >> release
 }
 
+addJ9Tag(){
+  # java.vm.version varies or for OpenJ9 depending on if it is a release build i.e. master-*gitSha* or 0.21.0
+  # This code makes sure that a version number is always present in the release file i.e. openj9-0.21.0
+  if [ ${BUILD_CONFIG[RELEASE]} = false ]; then
+    local j9Location="${BUILD_CONFIG[WORKSPACE_DIR]}/${BUILD_CONFIG[WORKING_DIR]}/${BUILD_CONFIG[OPENJDK_SOURCE_DIR]}/openj9"
+    # Pull the tag associated with the J9 commit being used
+    local j9Tag=$(git -C $j9Location describe --abbrev=0)
+    echo -e OPENJ9_TAG=\"$j9Tag\" >> release
+  fi
+}
+
 ################################################################################
 
 loadConfigFromFile