Ensure build TMPDIR consistency

1 files changed, 9 insertions, 10 deletions

diff --git a/hosts/common/core/nix.nix b/hosts/common/core/nix.nix
index 99aff56..a989f03 100644
--- a/hosts/common/core/nix.nix
+++ b/hosts/common/core/nix.nix
@@ -1,22 +1,18 @@
-{ inputs, lib, ... }: {
+{ inputs, lib, ... }: 
+
+let
+  build-tmp = "/var/tmp";
+in {
 
   nix = {
     settings = {
       auto-optimise-store = lib.mkDefault true;
-      build-dir = "/var/tmp";
+      build-dir = build-tmp;
       experimental-features = [ "nix-command" "flakes" ];
-      #flake-registry = ""; # Disable global flake registry   This is a hold-over setting from Misterio77. Not sure significance but likely to do with nix.registry entry below.
       trusted-users = [ "root" "@wheel" ];
       warn-dirty = false;
     };
 
-    # Add each flake input as a registry to make nix3 commands consistent with your flake
-    #registry = lib.mapAttrs (_: value: { flake = value; }) inputs;
-
-    # Add nixpkgs input to NIX_PATH
-    # This lets nix2 commands still use <nixpkgs>
-    #nixPath = [ "nixpkgs=${inputs.nixpkgs.outPath}" ];
-
     # Garbage Collection
     gc = {
       automatic = true;
@@ -27,4 +23,7 @@
     };
 
   };
+
+  systemd.services."nix-daemon".environment.TMPDIR = build-tmp;
+
 }