chore: move agenix to devshell

configs/common.nix

@@ -51,7 +51,6 @@ in {
 
   environment = {
     systemPackages = with pkgs; [
-      agenix.packages.${pkgs.system}.default
       neovim
       git
       curl
@@ -91,6 +90,7 @@ in {
 
   nix = {
     package = pkgs.lix;
+    channel.enable = false;
 
     gc = {
       automatic = true;
@@ -104,10 +104,18 @@ in {
       u.flake = camasca;
     };
 
+    # give nix daemon lower priority
+    daemonCPUSchedPolicy = "batch";
+    daemonIOSchedClass = "idle";
+
     settings = {
       auto-optimise-store = true;
       experimental-features = ["nix-command" "flakes"];
       trusted-users = ["root" "@wheel"];
+      connect-timeout = 5; # fail fast if substituters are not available
+      builders-use-substitutes = true;
+      log-lines = 25;
+      min-free = 512 * 1024 * 1024; # if free space drops under min, gc
 
       substituters = [
         "https://uku3lig.cachix.org"

flake.nix

@@ -5,6 +5,7 @@
     self,
     flake-parts,
     nixinate,
+    agenix,
     ...
   } @ inputs:
     flake-parts.lib.mkFlake {inherit inputs;} {
@@ -23,7 +24,11 @@
 
         devShells.default = with pkgs;
           mkShellNoCC {
-            packages = [just statix];
+            packages = [
+              just
+              statix
+              agenix.packages.${system}.default
+            ];
           };
 
         formatter = pkgs.alejandra;