diff --git a/nix/configuration/flake.nix b/nix/configuration/flake.nix
index c0f25ee..2b84092 100644
--- a/nix/configuration/flake.nix
+++ b/nix/configuration/flake.nix
@@ -93,6 +93,7 @@
             base_x86_64_linux
             // {
               modules = base_x86_64_linux.modules ++ [
+                ./hosts/odo
                 (nixpkgs + "/nixos/modules/installer/cd-dvd/iso-image.nix")
                 # TODO: Figure out how to do image based appliances
                 # (nixpkgs + "/nixos/modules/profiles/image-based-appliance.nix")
@@ -118,9 +119,8 @@
             base_x86_64_linux
             // {
               modules = base_x86_64_linux.modules ++ [
+                ./hosts/neelix
                 (nixpkgs + "/nixos/modules/installer/cd-dvd/iso-image.nix")
-                # TODO: Figure out how to do image based appliances
-                # (nixpkgs + "/nixos/modules/profiles/image-based-appliance.nix")
                 {
                   isoImage.makeEfiBootable = true;
                   isoImage.makeUsbBootable = true;
diff --git a/nix/configuration/hosts/neelix/optimized_build.nix b/nix/configuration/hosts/neelix/optimized_build.nix
index 4f678a4..a6ae54f 100644
--- a/nix/configuration/hosts/neelix/optimized_build.nix
+++ b/nix/configuration/hosts/neelix/optimized_build.nix
@@ -7,62 +7,72 @@
 {
   imports = [ ];
 
-  nix.settings.system-features = lib.mkForce [
-    "gccarch-alderlake"
-    "gccarch-x86-64-v3"
-    "benchmark"
-    "big-parallel"
-    "kvm"
-    "nixos-test"
+  config = lib.mkMerge [
+    { }
+    (lib.mkIf (!config.me.buildingIso) {
+      nix.settings.system-features = lib.mkForce [
+        "gccarch-alderlake"
+        "gccarch-x86-64-v3"
+        "benchmark"
+        "big-parallel"
+        "kvm"
+        "nixos-test"
+      ];
+
+      # nixpkgs.hostPlatform = {
+      #   gcc.arch = "alderlake";
+      #   gcc.tune = "alderlake";
+      #   system = "x86_64-linux";
+
+      # };
+
+      nixpkgs.overlays = [
+        (
+          self: super:
+          let
+            optimizeWithFlags =
+              pkg: flags:
+              pkg.overrideAttrs (old: {
+                NIX_CFLAGS_COMPILE = [ (old.NIX_CFLAGS_COMPILE or "") ] ++ flags;
+              });
+            addConfig =
+              additionalConfig: pkg:
+              pkg.override (oldconfig: {
+                structuredExtraConfig = pkg.structuredExtraConfig // additionalConfig;
+              });
+          in
+          {
+            linux_alderlake =
+              addConfig
+                {
+                  # Full preemption
+                  PREEMPT = lib.mkOverride 60 lib.kernel.yes;
+                  PREEMPT_VOLUNTARY = lib.mkOverride 60 lib.kernel.no;
+
+                  # Google's BBRv3 TCP congestion Control
+                  TCP_CONG_BBR = lib.kernel.yes;
+                  DEFAULT_BBR = lib.kernel.yes;
+
+                  # Preemptive Full Tickless Kernel at 300Hz
+                  HZ = lib.kernel.freeform "300";
+                  HZ_300 = lib.kernel.yes;
+                  HZ_1000 = lib.kernel.no;
+                }
+                (
+                  optimizeWithFlags super.linux_6_12 [
+                    "-march=alderlake"
+                    "-mtune=alderlake"
+                  ]
+                );
+          }
+        )
+      ];
+
+      boot.kernelPackages = pkgs.linuxPackagesFor pkgs.linux_alderlake;
+    })
+    (lib.mkIf (config.me.buildingIso) {
+      boot.kernelPackages = pkgs.linuxPackagesFor pkgs.linux_6_12;
+      boot.supportedFilesystems = [ "zfs" ];
+    })
   ];
-
-  # nixpkgs.hostPlatform = {
-  #   gcc.arch = "alderlake";
-  #   gcc.tune = "alderlake";
-  #   system = "x86_64-linux";
-  # };
-
-  nixpkgs.overlays = [
-    (
-      self: super:
-      let
-        optimizeWithFlags =
-          pkg: flags:
-          pkg.overrideAttrs (old: {
-            NIX_CFLAGS_COMPILE = [ (old.NIX_CFLAGS_COMPILE or "") ] ++ flags;
-          });
-        addConfig =
-          additionalConfig: pkg:
-          pkg.override (oldconfig: {
-            structuredExtraConfig = pkg.structuredExtraConfig // additionalConfig;
-          });
-      in
-      {
-        linux_alderlake =
-          addConfig
-            {
-              # Full preemption
-              PREEMPT = lib.mkOverride 60 lib.kernel.yes;
-              PREEMPT_VOLUNTARY = lib.mkOverride 60 lib.kernel.no;
-
-              # Google's BBRv3 TCP congestion Control
-              TCP_CONG_BBR = lib.kernel.yes;
-              DEFAULT_BBR = lib.kernel.yes;
-
-              # Preemptive Full Tickless Kernel at 300Hz
-              HZ = lib.kernel.freeform "300";
-              HZ_300 = lib.kernel.yes;
-              HZ_1000 = lib.kernel.no;
-            }
-            (
-              optimizeWithFlags super.linux_6_12 [
-                "-march=alderlake"
-                "-mtune=alderlake"
-              ]
-            );
-      }
-    )
-  ];
-
-  boot.kernelPackages = lib.mkIf (!config.me.buildingIso) (pkgs.linuxPackagesFor pkgs.linux_alderlake);
 }
diff --git a/nix/configuration/hosts/odo/optimized_build.nix b/nix/configuration/hosts/odo/optimized_build.nix
index 43d09b8..7e6fbc0 100644
--- a/nix/configuration/hosts/odo/optimized_build.nix
+++ b/nix/configuration/hosts/odo/optimized_build.nix
@@ -7,65 +7,75 @@
 {
   imports = [ ];
 
-  nix.settings.system-features = lib.mkForce [
-    "gccarch-znver4"
-    "gccarch-skylake"
-    # "gccarch-alderlake" missing WAITPKG
-    "gccarch-x86-64-v3"
-    "gccarch-x86-64-v4"
-    "benchmark"
-    "big-parallel"
-    "kvm"
-    "nixos-test"
+  config = lib.mkMerge [
+    { }
+    (lib.mkIf (!config.me.buildingIso) {
+      nix.settings.system-features = lib.mkForce [
+        "gccarch-znver4"
+        "gccarch-skylake"
+        # "gccarch-alderlake" missing WAITPKG
+        "gccarch-x86-64-v3"
+        "gccarch-x86-64-v4"
+        "benchmark"
+        "big-parallel"
+        "kvm"
+        "nixos-test"
+      ];
+
+      # nixpkgs.hostPlatform = {
+      #   gcc.arch = "znver4";
+      #   gcc.tune = "znver4";
+      #   system = "x86_64-linux";
+
+      # };
+
+      nixpkgs.overlays = [
+        (
+          self: super:
+          let
+            optimizeWithFlags =
+              pkg: flags:
+              pkg.overrideAttrs (old: {
+                NIX_CFLAGS_COMPILE = [ (old.NIX_CFLAGS_COMPILE or "") ] ++ flags;
+              });
+            addConfig =
+              additionalConfig: pkg:
+              pkg.override (oldconfig: {
+                structuredExtraConfig = pkg.structuredExtraConfig // additionalConfig;
+              });
+          in
+          {
+            linux_znver4 =
+              addConfig
+                {
+                  # Full preemption
+                  PREEMPT = lib.mkOverride 60 lib.kernel.yes;
+                  PREEMPT_VOLUNTARY = lib.mkOverride 60 lib.kernel.no;
+
+                  # Google's BBRv3 TCP congestion Control
+                  TCP_CONG_BBR = lib.kernel.yes;
+                  DEFAULT_BBR = lib.kernel.yes;
+
+                  # Preemptive Full Tickless Kernel at 300Hz
+                  HZ = lib.kernel.freeform "300";
+                  HZ_300 = lib.kernel.yes;
+                  HZ_1000 = lib.kernel.no;
+                }
+                (
+                  optimizeWithFlags super.linux_6_12 [
+                    "-march=znver4"
+                    "-mtune=znver4"
+                  ]
+                );
+          }
+        )
+      ];
+
+      boot.kernelPackages = pkgs.linuxPackagesFor pkgs.linux_znver4;
+    })
+    (lib.mkIf (config.me.buildingIso) {
+      boot.kernelPackages = pkgs.linuxPackagesFor pkgs.linux_6_12;
+      boot.supportedFilesystems.zfs = true;
+    })
   ];
-
-  # nixpkgs.hostPlatform = {
-  #   gcc.arch = "znver4";
-  #   gcc.tune = "znver4";
-  #   system = "x86_64-linux";
-  # };
-
-  nixpkgs.overlays = [
-    (
-      self: super:
-      let
-        optimizeWithFlags =
-          pkg: flags:
-          pkg.overrideAttrs (old: {
-            NIX_CFLAGS_COMPILE = [ (old.NIX_CFLAGS_COMPILE or "") ] ++ flags;
-          });
-        addConfig =
-          additionalConfig: pkg:
-          pkg.override (oldconfig: {
-            structuredExtraConfig = pkg.structuredExtraConfig // additionalConfig;
-          });
-      in
-      {
-        linux_znver4 =
-          addConfig
-            {
-              # Full preemption
-              PREEMPT = lib.mkOverride 60 lib.kernel.yes;
-              PREEMPT_VOLUNTARY = lib.mkOverride 60 lib.kernel.no;
-
-              # Google's BBRv3 TCP congestion Control
-              TCP_CONG_BBR = lib.kernel.yes;
-              DEFAULT_BBR = lib.kernel.yes;
-
-              # Preemptive Full Tickless Kernel at 300Hz
-              HZ = lib.kernel.freeform "300";
-              HZ_300 = lib.kernel.yes;
-              HZ_1000 = lib.kernel.no;
-            }
-            (
-              optimizeWithFlags super.linux_6_12 [
-                "-march=znver4"
-                "-mtune=znver4"
-              ]
-            );
-      }
-    )
-  ];
-
-  boot.kernelPackages = lib.mkIf (!config.me.buildingIso) (pkgs.linuxPackagesFor pkgs.linux_znver4);
 }