From 2bc87434703f9f6f2053397a36fe4b6c018ce0a5 Mon Sep 17 00:00:00 2001
From: adisbladis <adisbladis@gmail.com>
Date: Mon, 15 Feb 2021 16:37:08 +0100
Subject: [PATCH] overrides: Make more overrides safe against missing attrs

---
 overrides.nix | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/overrides.nix b/overrides.nix
index ef39e24..b714ff0 100644
--- a/overrides.nix
+++ b/overrides.nix
@@ -82,7 +82,7 @@ self: super:
   );
 
   celery = super.celery.overridePythonAttrs (old: {
-    propagatedBuildInputs = old.propagatedBuildInputs ++ [ self.setuptools ];
+    propagatedBuildInputs = (old.propagatedBuildInputs or [ ]) ++ [ self.setuptools ];
   });
 
   cssselect2 = super.cssselect2.overridePythonAttrs (
@@ -379,8 +379,8 @@ self: super:
   );
 
   jsonslicer = super.jsonslicer.overridePythonAttrs (old: {
-    nativeBuildInputs = old.nativeBuildInputs ++ [ pkgs.pkgconfig ];
-    buildInputs = old.buildInputs ++ [ pkgs.yajl ];
+    nativeBuildInputs = (old.nativeBuildInputs or [ ]) ++ [ pkgs.pkgconfig ];
+    buildInputs = (old.buildInputs or [ ]) ++ [ pkgs.yajl ];
   });
 
   jupyter = super.jupyter.overridePythonAttrs (