diff --git a/default.nix b/default.nix
index a606104..841aa45 100644
--- a/default.nix
+++ b/default.nix
@@ -11,8 +11,7 @@ let
     overlays = [overlay];
     config = {allowUnsupportedSystem = true; };
   });
-  inherit (pkgs) callPackage writeText liminix fetchFromGitHub;
-  inherit (pkgs.lib) concatStringsSep;
+
   config = (import ./merge-modules.nix) [
     ./modules/base.nix
     device.module
@@ -20,79 +19,13 @@ let
     ./modules/s6
     ./modules/users.nix
     (if phram then  ./modules/phram.nix else (args: {}))
+    ./modules/outputs.nix
   ] pkgs;
-  squashfs = liminix.builders.squashfs config.filesystem.contents;
 
-  openwrt = fetchFromGitHub {
-    name = "openwrt-source";
-    repo = "openwrt";
-    owner = "openwrt";
-    rev = "a5265497a4f6da158e95d6a450cb2cb6dc085cab";
-    hash = "sha256-YYi4gkpLjbOK7bM2MGQjAyEBuXJ9JNXoz/JEmYf8xE8=";
-  };
-
-  outputs = rec {
-    inherit squashfs;
-    kernel = liminix.builders.kernel.override {
-      inherit (config.kernel) config src extraPatchPhase;
-    };
-    dtb =  (callPackage ./kernel/dtb.nix {}) {
-      dts = config.kernel.dts;
-      includes = [
-        "${openwrt}/target/linux/ath79/dts"
-        "${kernel.headers}/include"
-      ];
-    };
-    uimage = (callPackage ./kernel/uimage.nix {}) {
-      commandLine = concatStringsSep " " config.boot.commandLine;
-      inherit (config.device) loadAddress entryPoint;
-      inherit kernel;
-      inherit dtb;
-    };
-    combined-image = pkgs.runCommand "firmware.bin" {
-      nativeBuildInputs = [ pkgs.buildPackages.ubootTools ];
-    } ''
-      mkdir $out
-      dd if=${uimage} of=$out/firmware.bin bs=128k conv=sync
-      dd if=${squashfs} of=$out/firmware.bin bs=128k conv=sync,nocreat,notrunc oflag=append
-    '';
-    boot-scr =
-      let
-        inherit (pkgs.lib.trivial) toHexString;
-        uimageStart = 10485760; # 0xa00000
-        squashfsStart = uimageStart + 4 * 1024 * 1024;
-        squashfsSize = 8;
-        cmd = "mtdparts=phram0:${toString squashfsSize}M(nix) phram.phram=phram0,0x${toHexString squashfsStart},${toString squashfsSize}Mi memmap=${toString squashfsSize}M\$0x${toHexString squashfsStart} root=1f00";
-      in
-        pkgs.buildPackages.writeScript "firmware.bin" ''
-          setenv serverip 192.168.8.148
-          setenv ipaddr 192.168.8.251
-          setenv bootargs '${concatStringsSep " " config.boot.commandLine} ${cmd}'
-          tftp 0x8${toHexString uimageStart} result/uimage ; tftp 0x8${toHexString squashfsStart} result/squashfs
-          bootm 0x${toHexString uimageStart}
-        '';
-
-    directory = pkgs.runCommand "liminix" {} (''
-      mkdir $out
-      cd $out
-      ln -s ${squashfs} squashfs
-      ln -s ${kernel} vmlinux
-      ln -s ${manifest} manifest
-      ln -s ${kernel.headers} build
-    '' +
-    (if config.device.loadAddress != null  then
-      ''
-      ln -s {uimage} uimage
-      ${if phram then "ln -s ${boot-scr} boot.scr" else ""}
-      ln -s ${boot-scr} flash.scr
-    '' else ""));
-    # this exists so that you can run "nix-store -q --tree" on it and find
-    # out what's in the image, which is nice if it's unexpectedly huge
-    manifest = writeText "manifest.json" (builtins.toJSON config.filesystem.contents);
-    tftpd = pkgs.buildPackages.tufted;
-  };
 in {
-  outputs = outputs // { default = outputs.${config.device.defaultOutput}; };
+  outputs = config.outputs // {
+    default = config.outputs.${config.device.defaultOutput};
+  };
 
   # this is just here as a convenience, so that we can get a
   # cross-compiling nix-shell for any package we're customizing
diff --git a/devices/gl-ar750/default.nix b/devices/gl-ar750/default.nix
index a7982f8..6ef1cdd 100644
--- a/devices/gl-ar750/default.nix
+++ b/devices/gl-ar750/default.nix
@@ -59,7 +59,12 @@
           patches ${openwrt}/target/linux/generic/hack-5.15/*.patch
           patches ${openwrt}/target/linux/ath79/patches-5.15/*.patch
         '';
-        dts = "${openwrt}/target/linux/ath79/dts/qca9531_glinet_gl-ar750.dts";
+        dts = {
+          src = "${openwrt}/target/linux/ath79/dts/qca9531_glinet_gl-ar750.dts";
+          includes =  [
+            "${openwrt}/target/linux/ath79/dts"
+          ];
+        };
         config = {
           MIPS_ELF_APPENDED_DTB = "y";
           OF = "y";
diff --git a/devices/gl-mt300a/default.nix b/devices/gl-mt300a/default.nix
index 6172cef..9dd0b5e 100644
--- a/devices/gl-mt300a/default.nix
+++ b/devices/gl-mt300a/default.nix
@@ -46,7 +46,12 @@
           patches ${openwrt}/target/linux/generic/hack-5.15/*.patch
           patches ${openwrt}/target/linux/ramips/patches-5.15/*.patch
         '';
-        dts = "${openwrt}/target/linux/ramips/dts/mt7620a_glinet_gl-mt300a.dts";
+        dts = {
+          src = "${openwrt}/target/linux/ramips/dts/mt7620a_glinet_gl-mt300a.dts";
+          includes = [
+            "${openwrt}/target/linux/ramips/dts"
+          ];
+        };
         config = {
           MIPS_ELF_APPENDED_DTB = "y";
           OF = "y";
diff --git a/devices/gl-mt300n-v2/default.nix b/devices/gl-mt300n-v2/default.nix
index ef19e1c..44a2e9b 100644
--- a/devices/gl-mt300n-v2/default.nix
+++ b/devices/gl-mt300n-v2/default.nix
@@ -46,7 +46,12 @@
           patches ${openwrt}/target/linux/generic/hack-5.15/*.patch
           patches ${openwrt}/target/linux/ramips/patches-5.15/*.patch
         '';
-        dts = "${openwrt}/target/linux/ramips/dts/mt7628an_glinet_gl-mt300n-v2.dts";
+        dts = {
+          src = "${openwrt}/target/linux/ramips/dts/mt7628an_glinet_gl-mt300n-v2.dts";
+          includes = [
+            "${openwrt}/target/linux/ramips/dts"
+          ];
+        };
         config = {
           MIPS_ELF_APPENDED_DTB = "y";
           OF = "y";
diff --git a/modules/base.nix b/modules/base.nix
index 9c16df6..e290e06 100644
--- a/modules/base.nix
+++ b/modules/base.nix
@@ -29,7 +29,13 @@ in {
         default = "true";
         type = types.lines;
       } ;
-      dts = mkOption { type = types.path; };
+      dts = {
+        src = mkOption { type = types.path; };
+        includes = mkOption {
+          default = [];
+          type = types.listOf types.path;
+        };
+      };
       config = mkOption {
         # mostly the values are y n or m, but sometimes
         # other strings are also used
diff --git a/modules/outputs.nix b/modules/outputs.nix
new file mode 100644
index 0000000..2cd92cb
--- /dev/null
+++ b/modules/outputs.nix
@@ -0,0 +1,78 @@
+{
+  config
+, pkgs
+, lib
+, ...
+}:
+let
+  inherit (lib) mkOption types concatStringsSep;
+  inherit (pkgs) liminix callPackage writeText;
+in
+{
+  options = {
+    outputs = mkOption {
+      type = types.attrsOf types.package;
+      default = {};
+    };
+  };
+  config = {
+    outputs = rec {
+      squashfs = liminix.builders.squashfs config.filesystem.contents;
+      tftpd = pkgs.buildPackages.tufted;
+      kernel = liminix.builders.kernel.override {
+        inherit (config.kernel) config src extraPatchPhase;
+      };
+      dtb =  (callPackage ../kernel/dtb.nix {}) {
+        dts = config.kernel.dts.src;
+        includes = config.kernel.dts.includes ++ [
+          "${kernel.headers}/include"
+        ];
+      };
+      uimage = (callPackage ../kernel/uimage.nix {}) {
+        commandLine = concatStringsSep " " config.boot.commandLine;
+        inherit (config.device) loadAddress entryPoint;
+        inherit kernel;
+        inherit dtb;
+      };
+      combined-image = pkgs.runCommand "firmware.bin" {
+        nativeBuildInputs = [ pkgs.buildPackages.ubootTools ];
+      } ''
+        mkdir $out
+        dd if=${uimage} of=$out/firmware.bin bs=128k conv=sync
+        dd if=${squashfs} of=$out/firmware.bin bs=128k conv=sync,nocreat,notrunc oflag=append
+      '';
+      boot-scr =
+        let
+          inherit (pkgs.lib.trivial) toHexString;
+          uimageStart = 10485760; # 0xa00000
+          squashfsStart = uimageStart + 4 * 1024 * 1024;
+          squashfsSize = 8;
+          cmd = "mtdparts=phram0:${toString squashfsSize}M(nix) phram.phram=phram0,0x${toHexString squashfsStart},${toString squashfsSize}Mi memmap=${toString squashfsSize}M\$0x${toHexString squashfsStart} root=1f00";
+        in
+          pkgs.buildPackages.writeScript "firmware.bin" ''
+            setenv serverip 192.168.8.148
+            setenv ipaddr 192.168.8.251
+            setenv bootargs '${concatStringsSep " " config.boot.commandLine} ${cmd}'
+            tftp 0x8${toHexString uimageStart} result/uimage ; tftp 0x8${toHexString squashfsStart} result/squashfs
+            bootm 0x${toHexString uimageStart}
+          '';
+
+      directory = pkgs.runCommand "liminix" {} (''
+        mkdir $out
+        cd $out
+        ln -s ${squashfs} squashfs
+        ln -s ${kernel} vmlinux
+        ln -s ${manifest} manifest
+        ln -s ${kernel.headers} build
+      '' +
+        (if config.device.loadAddress != null  then
+          ''
+            ln -s ${uimage} uimage
+            ln -s ${boot-scr} flash.scr
+          '' else ""));
+      # this exists so that you can run "nix-store -q --tree" on it and find
+      # out what's in the image, which is nice if it's unexpectedly huge
+      manifest = writeText "manifest.json" (builtins.toJSON config.filesystem.contents);
+    };
+  };
+}