ref(modules/nix): update a number of settings for nix

Inspired by https://jackson.dev/post/nix-reasonable-defaults/

1 files changed, 15 insertions, 4 deletions

diff --git a/modules/system/nix/default.nix b/modules/system/nix/default.nix
index 01df04b..67029ad 100644
--- a/modules/system/nix/default.nix
+++ b/modules/system/nix/default.nix
@@ -2,10 +2,6 @@
 { lib, pkgs, ... }: {
   nix = {
     package = pkgs.nixFlakes;
-    extraOptions = ''
-      experimental-features = nix-command flakes
-    '';
-
     settings = {
       trusted-users = [ "root" "@wheel" ];
       auto-optimise-store = true;
@@ -17,6 +13,21 @@
         "cachix.cachix.org-1:eWNHQldwUO7G2VkjpnjDbWwy4KQ/HNxht7H4SSoMckM="
         "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
       ];
+      experimental-features = [ "nix-command" "flakes" ];
+      # Whether to warn about dirty Git/Mercurial trees - this is not
+      # useful information to me.
+      warn-dirty = false;
+      # The timeout (in seconds) for establishing connections in the binary
+      # cache substituter. It corresponds to curl’s –connect-timeout option.
+      # The default is equivalent to 300 seconds, way too long.
+      connect-timeout = 5;
+      # The number of lines of the tail of the log to show if a build fails.
+      # The default is 10 and it's usually too short.
+      log-lines = 25;
+      # If set to true, Nix will fall back to building from source if
+      # a binary substitute fails. This is equivalent to the –fallback
+      # flag. The default is false.
+      fallback = true;
     };
 
     gc = {