diff --git a/032 b/032
index 4261ca2..bf88492 100755
--- a/032
+++ b/032
@@ -45,7 +45,7 @@ _require_nobigloopfs
 _require_scratch
 
 echo "Silence is golden."
-for fs in `echo /sbin/mkfs.* | sed -e 's/.sbin.mkfs.//g'`
+for fs in `echo ${MKFS_PROG}.* | sed -e 's/.sbin.mkfs.//g'`
 do
 	preop=""	# for special input needs
 	preargs=""	# for any special pre-device options
@@ -78,7 +78,7 @@ do
 	if [ $? -eq 0 ] ; then
 		# next, ensure we don't overwrite it
 		echo "=== Attempting XFS overwrite of $fs..." >>$seq.full
-		/sbin/mkfs.xfs $SCRATCH_DEV >>$seq.full 2>&1
+		${MKFS_PROG}.xfs $SCRATCH_DEV >>$seq.full 2>&1
 
 		[ $? -eq 0 ] && echo "Failed - overwrote fs type ${fs}!"
 	else
diff --git a/049 b/049
index c6c4faa..8d4a22f 100755
--- a/049
+++ b/049
@@ -83,7 +83,7 @@ mount -t ext2 $SCRATCH_DEV $SCRATCH_MNT >> $seq.full 2>&1 \
     || _fail "!!! failed to mount"
 
 _log "Create xfs fs in file on scratch"
-/sbin/mkfs.xfs -f -dfile,name=$SCRATCH_MNT/test.xfs,size=40m \
+${MKFS_PROG}.xfs -f -dfile,name=$SCRATCH_MNT/test.xfs,size=40m \
     >> $seq.full 2>&1 \
     || _fail "!!! failed to mkfs xfs"
 
diff --git a/073 b/073
index 18257d4..fc0951f 100755
--- a/073
+++ b/073
@@ -155,7 +155,7 @@ _verify_copy $imgs.image $SCRATCH_DEV $SCRATCH_MNT
 
 echo 
 echo === copying scratch device to single target, large ro device
-/sbin/mkfs.xfs -dfile,name=$imgs.source,size=100g | _filter_mkfs 2>/dev/null
+${MKFS_PROG}.xfs -dfile,name=$imgs.source,size=100g | _filter_mkfs 2>/dev/null
 rmdir $imgs.source_dir 2>/dev/null
 mkdir $imgs.source_dir
 
diff --git a/common.rc b/common.rc
index 35f782b..a356c02 100644
--- a/common.rc
+++ b/common.rc
@@ -314,7 +314,7 @@ _scratch_mkfs()
         $MKFS_BTRFS_PROG $MKFS_OPTIONS $* $SCRATCH_DEV > /dev/null
 	;;
     *)
-	/sbin/mkfs -t $FSTYP -- $MKFS_OPTIONS $* $SCRATCH_DEV
+	yes | $MKFS_PROG -t $FSTYP -- $MKFS_OPTIONS $* $SCRATCH_DEV
 	;;
     esac
 }
@@ -333,7 +333,7 @@ _scratch_mkfs_sized()
 	_scratch_mkfs_xfs -d size=$fssize -b size=$blocksize
 	;;
     ext2|ext3|ext4|ext4dev)
-	/sbin/mkfs.$FSTYP $MKFS_OPTIONS -b $blocksize $SCRATCH_DEV $blocks
+	yes | ${MKFS_PROG}.$FSTYP $MKFS_OPTIONS -b $blocksize $SCRATCH_DEV $blocks
 	;;
     btrfs)
 	$MKFS_BTRFS_PROG $MKFS_OPTIONS -b $fssize $SCRATCH_DEV