diff --git a/.github/workflows/scripts/reclaim_disk_space.sh b/.github/workflows/scripts/reclaim_disk_space.sh
index cc16a9079317..ed23ce31d85c 100755
--- a/.github/workflows/scripts/reclaim_disk_space.sh
+++ b/.github/workflows/scripts/reclaim_disk_space.sh
@@ -1,20 +1,23 @@
 #!/bin/sh
 
 set -eu
 
 # remove 4GiB of images
 sudo systemd-run docker system prune --force --all --volumes
 
 # remove unused software
-sudo systemd-run rm -rf \
+sudo systemd-run --wait rm -rf \
   "$AGENT_TOOLSDIRECTORY" \
   /opt/* \
   /usr/local/* \
   /usr/share/az* \
   /usr/share/dotnet \
   /usr/share/gradle* \
   /usr/share/miniconda \
   /usr/share/swift \
   /var/lib/gems \
   /var/lib/mysql \
   /var/lib/snapd
+
+# trim the cleaned space
+sudo fstrim /