diff --git a/stx/toCOPY/pkgbuilder/setup.sh b/stx/toCOPY/pkgbuilder/setup.sh
index 86a5a805c..686d29500 100755
--- a/stx/toCOPY/pkgbuilder/setup.sh
+++ b/stx/toCOPY/pkgbuilder/setup.sh
@@ -1,5 +1,7 @@
 #!/bin/bash
 
+SCHROOT_FSTAB="/etc/schroot/sbuild/fstab"
+
 if [ -f "/etc/fstab" ]; then
     speed_up=`cat /etc/fstab | grep 'speeding up sbuild'`
     [ "x${speed_up}" != "x" ] && exit 0
@@ -11,4 +13,9 @@ tmpfs /var/lib/schroot/session        tmpfs uid=root,gid=root,mode=0755 0 0
 tmpfs /var/lib/schroot/union/overlay  tmpfs uid=root,gid=root,mode=0755 0 0
 EOF
 
+# The root '/' of the container is on docker overlay, so the
+# original '/build' of chroot is on overlay, here remove the
+# setting and make the '/build' to the shared volume of container
+sed -i "/\/var\/lib\/sbuild\/build/d" ${SCHROOT_FSTAB}
+
 mount -a