fix(zpool); Ignore shadow-mount error during recreate of zpool at existing non-empty path

Author: Bert-Proesmans

lib/types/zpool.nix

@@ -365,6 +365,18 @@ in
             if [ $continue -eq 1 ]; then
               zpool create -f "${config.name}" \
                 -R ${rootMountPoint} \
+                ${
+                  if
+                    (
+                      # NOTE; It might be necessary to validate the value of config.options.mountpoint too
+                      config.rootFsOptions.canmount or "" == "off"
+                    )
+                  then
+                    # Mountpoint of root(pool)-dataset could be non-empty and ZFS by default prevents shadowing mounts.
+                    "-m none"
+                  else
+                    ""
+                } \
                 ${lib.concatStringsSep " " (lib.mapAttrsToList (n: v: "-o ${n}=${v}") config.options)} \
                 ${lib.concatStringsSep " " (lib.mapAttrsToList (n: v: "-O ${n}=${v}") config.rootFsOptions)} \
                 ''${topology:+ $topology}