diff --git a/archachatina.nix b/archachatina.nix
index 8f3e20f..4eedc47 100644
--- a/archachatina.nix
+++ b/archachatina.nix
@@ -5,6 +5,7 @@
     [
       ./common.nix
       ./uefi.nix
+      ./fstrim.nix
     ];
 
   environment.etc."lvm/lvm.conf".text = ''
diff --git a/euhadra.nix b/euhadra.nix
index d7f20e0..d7fee16 100644
--- a/euhadra.nix
+++ b/euhadra.nix
@@ -5,6 +5,7 @@
     [
       ./common.nix
       ./uefi.nix
+      ./fstrim.nix
     ];
 
   boot.initrd.luks.devices = [ { name = "euhadra_crypt"; device = "/dev/disk/by-uuid/328a9ede-0958-490b-8e82-62b06b839e21"; preLVM = true; } ];
diff --git a/fstrim.nix b/fstrim.nix
new file mode 100644
index 0000000..0b8d552
--- /dev/null
+++ b/fstrim.nix
@@ -0,0 +1,15 @@
+{ config, pkgs, ... }:
+{
+  systemd.services.fstrimroot = {
+    path = [ pkgs.eject ];
+
+    restartIfChanged = false;
+    serviceConfig = {
+      Type = "oneshot";
+    };
+
+    script = "fstrim -v /";
+
+    startAt = "04:00";
+  };
+}
diff --git a/theba.nix b/theba.nix
index 83b6ef4..f7b8549 100644
--- a/theba.nix
+++ b/theba.nix
@@ -5,6 +5,7 @@
     [
       ./common.nix
       ./uefi.nix
+      ./fstrim.nix
     ];
 
   environment.etc."lvm/lvm.conf".text = ''