nixbld: fix nixops deprecated pipes module

nixbld-etc-nixos/configuration.nix

@@ -933,7 +933,10 @@ in
   nixpkgs.config.packageOverrides = super: let self = super.pkgs; in {
     nix = super.nix.appendPatches [ ./nix-networked-derivations.patch ];
     nixops_unstable_minimal = super.nixops_unstable_minimal.overrideAttrs (oa: {
-        patches = oa.patches or [] ++ [ ./nixops-skip-unreachable-host.patch ];
+        patches = oa.patches or [] ++ [
+          ./nixops-skip-unreachable-host.patch
+          ./nixops-fix-deprecated-pipes.patch
+        ];
     });
     hydra = super.hydra.overrideAttrs(oa: {
       patches = oa.patches or [] ++ [

nixbld-etc-nixos/nixops-fix-deprecated-pipes.patch

@@ -0,0 +1,22 @@
+diff --git a/nixops/script_defs.py b/nixops/script_defs.py
+index 2f75e943..7268ca3a 100644
+--- a/nixops/script_defs.py
++++ b/nixops/script_defs.py
+@@ -22,7 +22,7 @@ import logging
+ import logging.handlers
+ import json
+ from tempfile import TemporaryDirectory
+-import pipes
++import shlex
+ from typing import Tuple, List, Optional, Union, Generator, Type, Set, Sequence
+ import nixops.ansi
+ 
+@@ -1117,7 +1117,7 @@ def op_edit(args: Namespace) -> None:
+         if not editor:
+             raise Exception("the $EDITOR environment variable is not set")
+         os.system(
+-            "$EDITOR " + " ".join([pipes.quote(x) for x in depl.network_expr.network])
++            "$EDITOR " + " ".join([shlex.quote(x) for x in depl.network_expr.network])
+         )
+ 
+