diff --git a/default.nix b/default.nix
index 2e5a7fb..dd99827 100644
--- a/default.nix
+++ b/default.nix
@@ -29,7 +29,7 @@ let
   outputs = rec {
     inherit squashfs;
     kernel = nixpkgs.kernel.override {
-      inherit (config.kernel) config checkedConfig;
+      inherit (config.kernel) config;
     };
     dtb =  (callPackage ./kernel/dtb.nix {}) {
       dts = "${openwrt}/target/linux/ath79/dts/qca9531_glinet_gl-ar750.dts";
diff --git a/devices/gl-ar750/default.nix b/devices/gl-ar750/default.nix
index ae315d4..b0d391e 100644
--- a/devices/gl-ar750/default.nix
+++ b/devices/gl-ar750/default.nix
@@ -62,7 +62,7 @@
       };
     };
   kernel = rec {
-    checkedConfig = {
+    config = {
       MIPS_ELF_APPENDED_DTB = "y";
       OF = "y";
       USE_OF = "y";
diff --git a/devices/qemu/default.nix b/devices/qemu/default.nix
index 30394be..7b94ce6 100644
--- a/devices/qemu/default.nix
+++ b/devices/qemu/default.nix
@@ -29,7 +29,7 @@
     };
 
   kernel = {
-    checkedConfig = {
+    config = {
       MIPS_MALTA= "y";
       CPU_LITTLE_ENDIAN= "n";
       CPU_BIG_ENDIAN= "y";
diff --git a/kernel/default.nix b/kernel/default.nix
index 18cc743..70ecaef 100644
--- a/kernel/default.nix
+++ b/kernel/default.nix
@@ -2,13 +2,12 @@
   callPackage
 
 , config
-, checkedConfig
 , sources
 }:
 {
   vmlinux = callPackage ./vmlinux.nix {
     tree = sources.kernel;
-    inherit config checkedConfig;
+    inherit config;
   };
 
   uimage = callPackage ./uimage.nix { };
diff --git a/modules/base.nix b/modules/base.nix
index 1ef6714..e45dddf 100644
--- a/modules/base.nix
+++ b/modules/base.nix
@@ -29,10 +29,6 @@ in {
         # other strings are also used
         type = types.attrsOf types.nonEmptyStr;
       };
-      checkedConfig = mkOption {
-        type = types.attrsOf types.nonEmptyStr;
-        default = {};
-      };
     };
     boot.commandLine = mkOption {
       type = types.listOf types.nonEmptyStr;
@@ -71,7 +67,6 @@ in {
         TMPFS_POSIX_ACL = "y";
         TMPFS_XATTR = "y";
       };
-      checkedConfig = config;
     };
     boot.commandLine = [
       "earlyprintk=serial,ttyS0 console=ttyS0,115200 panic=10 oops=panic init=/bin/init loglevel=8 rootfstype=squashfs"
diff --git a/modules/phram.nix b/modules/phram.nix
index 9bb8e18..e98f227 100644
--- a/modules/phram.nix
+++ b/modules/phram.nix
@@ -5,7 +5,7 @@
 {
   config = {
     kernel = {
-      checkedConfig = {
+      config = {
         MTD = "y";
         MTD_PHRAM = "y";
         MTD_CMDLINE_PARTS = "y";
diff --git a/modules/wlan.nix b/modules/wlan.nix
index 77fea2b..bfb4569 100644
--- a/modules/wlan.nix
+++ b/modules/wlan.nix
@@ -7,7 +7,7 @@ let
 in {
   config = {
     kernel = rec {
-      checkedConfig = {
+      config = {
         CFG80211= "y";
         MAC80211= "y";
         MAC80211_MESH= "y";
diff --git a/pkgs/kernel/default.nix b/pkgs/kernel/default.nix
index e2dcb94..2c05b95 100644
--- a/pkgs/kernel/default.nix
+++ b/pkgs/kernel/default.nix
@@ -5,7 +5,6 @@
  , lib
 
  , config
- , checkedConfig ? {}
  , src
  , extraPatchPhase ? "true"
 } :
@@ -16,8 +15,7 @@ let writeConfig = name : config: writeText name
             (name: value: (if value == "n" then "# CONFIG_${name} is not set" else "CONFIG_${name}=${value}"))
             config
           ));
-    kconfigFile = writeConfig "kconfig" (config // checkedConfig);
-    checkedConfigFile = writeConfig "checked_kconfig" checkedConfig ;
+    kconfigFile = writeConfig "kconfig" config;
     inherit lib; in
 stdenv.mkDerivation rec {
   name = "kernel";
@@ -75,7 +73,7 @@ stdenv.mkDerivation rec {
 
   checkConfigurationPhase = ''
     echo Checking required config items:
-    if comm -2 -3 <(grep 'CONFIG' ${checkedConfigFile} |sort) <(grep 'CONFIG' .config|sort) |grep '.'    ; then
+    if comm -2 -3 <(grep 'CONFIG' ${kconfigFile} |sort) <(grep 'CONFIG' .config|sort) |grep '.'    ; then
       echo -e "^^^ Some configuration lost :-(\nPerhaps you have mutually incompatible settings, or have disabled options on which these depend.\n"
       exit 0
     fi
diff --git a/tests/kernel/run.sh b/tests/kernel/run.sh
index 0ffe338..55cf362 100755
--- a/tests/kernel/run.sh
+++ b/tests/kernel/run.sh
@@ -1,5 +1,5 @@
 set -e
-NIXPKGS_ALLOW_UNSUPPORTED_SYSTEM=1 nix-build '<liminix>' -I liminix-config=../smoke/configuration.nix --arg device "import <liminix/devices/$DEVICE>" -A outputs.kernel.vmlinux -o vmlinux $*
+NIXPKGS_ALLOW_UNSUPPORTED_SYSTEM=1 nix-build '<liminix>' -I liminix-config=../smoke/configuration.nix --arg device "import <liminix/devices/$DEVICE>" -A outputs.kernel -o vmlinux $*
 
 TESTS=$(cat <<"EOF"
 
diff --git a/tests/pppoe/configuration.nix b/tests/pppoe/configuration.nix
index b1da896..c6fa632 100644
--- a/tests/pppoe/configuration.nix
+++ b/tests/pppoe/configuration.nix
@@ -21,6 +21,7 @@ in rec {
     "PPP" = "y";
     "PPPOE" = "y";
     "PPPOL2TP" = "y";
+    "L2TP" = "y";
     "PPP_ASYNC" = "y";
     "PPP_BSDCOMP" = "y";
     "PPP_DEFLATE" = "y";
diff --git a/tests/wlan/configuration.nix b/tests/wlan/configuration.nix
index 5b687eb..66a6ba5 100644
--- a/tests/wlan/configuration.nix
+++ b/tests/wlan/configuration.nix
@@ -15,7 +15,7 @@ in rec {
 
   imports = [ ../../modules/wlan.nix ];
 
-  kernel.checkedConfig = {
+  kernel.config = {
     MAC80211_HWSIM = "y";
   };