bind mount fix

src/utils.py

@@ -177,9 +177,9 @@ class Stage:
 class Mount:
     def mount(rootfs):
         for dir in ["dev", "dev/pts", "sys", "proc", "run"]:
-            run("mount --bind /{1} /{0}/{1} 2>/dev/null".format(rootfs, dir))
+            run("mount --make-private --bind /{1} /{0}/{1} 2>/dev/null".format(rootfs, dir))
         run("ln -s {0}/proc/self/fd {0}/dev/fd 2>/dev/null || true".format(rootfs), vital=False)
-        run("ln -s {0}/proc/self/mounts {0}/etc/mtab || true")
+        run("ln -s {0}/proc/self/mounts {0}/etc/mtab || true".format(rootfs), vital=False)
         
 
     def unmount(rootfs):