From 3d4832990c8770c789c359cdffc505ddb31ca83d Mon Sep 17 00:00:00 2001
From: James Reynolds <james.reynolds@cristiesoftware.com>
Date: Mon, 6 Jun 2022 10:20:56 +0100
Subject: [PATCH] Fix error: attribute 'lastModifiedDate' missing

Only applies to some versions of flakes, tested on nix 2.8.1.
---
 flake.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/flake.nix b/flake.nix
index aee2abd6..a756ed90 100644
--- a/flake.nix
+++ b/flake.nix
@@ -33,11 +33,11 @@
   in {
     packages = genSystems (system: {
       wlroots = pkgsFor.${system}.wlroots.overrideAttrs (prev: {
-        version = mkVersion inputs.wlroots.lastModifiedDate;
+        version = mkVersion (toString (inputs.wlroots.lastModifiedDate or inputs.wlroots.lastModified or "19700101"));
         src = inputs.wlroots;
       });
       default = pkgsFor.${system}.callPackage ./nix/default.nix {
-        version = mkVersion self.lastModifiedDate;
+        version = mkVersion (toString (self.lastModifiedDate or self.lastModified or "19700101"));
         inherit (self.packages.${system}) wlroots;
       };
     });