nh

etcnixos/common.nix

@@ -16,13 +16,6 @@
   ];
 
   nix = {
-    # garbage collection and cleanup stuff
-    gc = {
-      automatic = true;
-      dates = "weekly";
-      options = "--delete-older-than 7d";
-    };
-
     # optimize the store
     optimise.automatic = true;
 
@@ -33,6 +26,13 @@
     ];
   };
 
+  # https://github.com/viperML/nh
+  programs.nh = {
+    enable = true;
+    clean.enable = true;
+    clean.extraArgs = "--keep-since 4d --keep 3";
+  };
+
   # kernel options
   boot = {
     kernelPackages = pkgs.linuxPackages_cachyos-lto;