diff --git a/flake.nix b/flake.nix
index 91851f0..5d96229 100644
--- a/flake.nix
+++ b/flake.nix
@@ -56,6 +56,7 @@
 
       odinBaseModules = [
         { nixpkgs = nixpkgsSettings; }
+        ./nixos_modules/automatic-garbage-collection.nix
         ./odin/hardware-configuration.nix
         nixos-hardware.nixosModules.common-cpu-intel
         nixos-hardware.nixosModules.common-pc-laptop
@@ -65,6 +66,7 @@
 
       thorBaseModules = [
         { nixpkgs = nixpkgsSettings; }
+        ./nixos_modules/automatic-garbage-collection.nix
         ./thor/hardware-configuration.nix
         nixos-hardware.nixosModules.common-cpu-amd
         nixos-hardware.nixosModules.common-pc-ssd
@@ -73,6 +75,7 @@
 
       lokiBaseModules = [
         { nixpkgs = nixpkgsSettings; }
+        ./nixos_modules/automatic-garbage-collection.nix
         ./loki/hardware-configuration.nix
         nixos-hardware.nixosModules.common-cpu-intel
         nixos-hardware.nixosModules.common-pc-ssd
diff --git a/loki/configuration.nix b/loki/configuration.nix
index a4dad2a..c7974a1 100644
--- a/loki/configuration.nix
+++ b/loki/configuration.nix
@@ -337,7 +337,6 @@ with lib;
     package = pkgs.nixFlakes;
     extraOptions = optionalString (config.nix.package == pkgs.nixFlakes)
       "experimental-features = nix-command flakes";
-    gc.automatic = true;
   };
 
   system.autoUpgrade = {
diff --git a/nixos_modules/automatic-garbage-collection.nix b/nixos_modules/automatic-garbage-collection.nix
new file mode 100644
index 0000000..d8a7719
--- /dev/null
+++ b/nixos_modules/automatic-garbage-collection.nix
@@ -0,0 +1,3 @@
+{
+  nix.gc = { automatic = true; options = "--delete-older-than 7d"; };
+}
diff --git a/odin/common_configuration.nix b/odin/common_configuration.nix
index ed26a4e..4ccfe00 100644
--- a/odin/common_configuration.nix
+++ b/odin/common_configuration.nix
@@ -236,10 +236,6 @@ with lib;
     package = pkgs.nixFlakes;
     extraOptions = lib.optionalString (config.nix.package == pkgs.nixFlakes)
       "experimental-features = nix-command flakes";
-    gc = {
-      automatic = true;
-      options = "--delete-older-than 7d";
-    };
   };
 
   # This value determines the NixOS release from which the default
diff --git a/thor/configuration.nix b/thor/configuration.nix
index a1138d1..9fa341f 100644
--- a/thor/configuration.nix
+++ b/thor/configuration.nix
@@ -173,7 +173,6 @@ with lib;
   nix = {
     package = pkgs.nixFlakes;
     extraOptions = "experimental-features = nix-command flakes";
-    gc.automatic = true;
   };
 
   system.stateVersion = "21.05"; # Did you read the comment?