diff --git a/build/build/build.sh b/build/build/build.sh
index 2910523..0d6e209 100755
--- a/build/build/build.sh
+++ b/build/build/build.sh
@@ -274,9 +274,11 @@ fi
 # Once all scripts have completed, come back to the directory from which this script was launched.
 cd $current && echo "cd $current" |& log
 
-newrootsize=$(ls -hs "${imagename}" | cut -f1 -d' ')
-relativeimage=$(realpath --relative-to="$PWD" "$imagename")
-echo "$relativeimage was built successfully" | log
-echo "Size of $relativeimage is ${newrootsize}" | log
+relativeImage=$(realpath --relative-to="$PWD" "$imagename")
+echo "Compressing $relativeImage" | log
+xz -T0 -M 512M --verbose "$relativeImage" | log
+echo "$relativeImage was built successfully" | log
+newrootsize=$(ls -hs "${imagename}.xz" | cut -f1 -d' ')
+echo "Size of ${relativeImage}.xz is ${newrootsize}" | log
 
 exit 0