diff --git a/scripts/Build-Pkg b/scripts/Build-Pkg
index c2d6f3873..13af6c9c7 100755
--- a/scripts/Build-Pkg
+++ b/scripts/Build-Pkg
@@ -187,10 +187,10 @@ if [ "$chroot" = 1 ] ; then
 	cat <<- EOT > $builddir/R_umount.sh
 		umount proc R.orig/download R.orig R.build
 	EOT
-	cat <<- 'EOT' > $builddir/debug.sh
+	cat <<- EOT > $builddir/debug.sh
 		sh R_mount.sh
 		chroot . bin/bash -c 'cd R.src ; exec ./debug.sh'
-		[ -z "`fuser R.src/build.pid`" ] && sh R_umount.sh
+		[ -z "\`fuser R.src/build.pid\`" ] && sh R_umount.sh
 	EOT
 	chmod +x $builddir/debug.sh