From ce7479ef91037dbe08540d8148cd2fdd509f4abd Mon Sep 17 00:00:00 2001
From: Bobby Rong <rjl931189261@126.com>
Date: Thu, 7 Oct 2021 11:52:48 +0800
Subject: [PATCH] nixos/evince: add option for specify package

---
 nixos/modules/programs/evince.nix | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/nixos/modules/programs/evince.nix b/nixos/modules/programs/evince.nix
index 473fddb09d02..c033230afb10 100644
--- a/nixos/modules/programs/evince.nix
+++ b/nixos/modules/programs/evince.nix
@@ -4,7 +4,9 @@
 
 with lib;
 
-{
+let cfg = config.programs.evince;
+
+in {
 
   # Added 2019-08-09
   imports = [
@@ -22,6 +24,13 @@ with lib;
       enable = mkEnableOption
         "Evince, the GNOME document viewer";
 
+      package = mkOption {
+        type = types.package;
+        default = pkgs.evince;
+        defaultText = literalExpression "pkgs.evince";
+        description = "Evince derivation to use.";
+      };
+
     };
 
   };
@@ -31,11 +40,11 @@ with lib;
 
   config = mkIf config.programs.evince.enable {
 
-    environment.systemPackages = [ pkgs.evince ];
+    environment.systemPackages = [ cfg.package ];
 
-    services.dbus.packages = [ pkgs.evince ];
+    services.dbus.packages = [ cfg.package ];
 
-    systemd.packages = [ pkgs.evince ];
+    systemd.packages = [ cfg.package ];
 
   };