diff --git a/.github/workflows/poudriere.yml b/.github/workflows/poudriere.yml
index a913105..753a0c0 100644
--- a/.github/workflows/poudriere.yml
+++ b/.github/workflows/poudriere.yml
@@ -69,6 +69,7 @@ jobs:
             set -x
             set -e
 
+            df -h -tufs
             poudriere ports -l
             poudriere jail -l
 
@@ -78,6 +79,7 @@ jobs:
             PORTS_NAME="default"
             OVERLAY_DIR=`realpath .`
             PORT_TO_BUILD=${{ matrix.PORT }}
+            MAX_JOBS=1
 
             # avoid "fatal: detected dubious ownership in repository at ..."
             sudo chown -R root:wheel "${OVERLAY_DIR}"
@@ -90,12 +92,14 @@ jobs:
             # PACKAGE_FETCH_URL (-b). Test the port with Q/A checks (-Ct). use
             # `true` to prevent failure on build failures. the job will fail
             # later if any build fails. limit the number of job to 2.
-            sudo poudriere bulk -j "${JAIL_NAME}" -O overlay -b latest -J 2 -Ct ${PORT_TO_BUILD} || true
+            sudo poudriere bulk -j "${JAIL_NAME}" -O overlay -b latest -J "${MAX_JOBS}" -Ct ${PORT_TO_BUILD} || true
 
             # collect the logs. freebsd-vm will copy them back to the host OS.
             tree "/usr/local/poudriere/data/logs/bulk/${JAIL_NAME}-${PORTS_NAME}/latest/logs"
             sudo cp -R "/usr/local/poudriere/data/logs/bulk/${JAIL_NAME}-${PORTS_NAME}/latest/logs" ${OVERLAY_DIR}/logs
 
+            df -h -tufs
+
       - name: Create a safe port name from matrix.PORT
         shell: sh
         run: |