Removing -l option for umount of the loop device. Daniel says that

the -l option does not deallocate the actual loop device, which is why
we were running out of those on the build machine.

diff --git a/build.common b/build.common
index 52c1887..23d282d 100644 (file)
--- a/build.common
+++ b/build.common
@@ -636,7 +636,7 @@ function pl_make_image() {
     (cd $root && tar cpf - .) | (cd $tmp && tar xpf -)
 
     # Unmount it
-    umount -l $tmp
+    umount $tmp
     rmdir $tmp
     trap - ERR INT
 }