diff --git a/examples/default.nix b/examples/default.nix
index 555009e..b07c25c 100644
--- a/examples/default.nix
+++ b/examples/default.nix
@@ -1,5 +1,9 @@
-{ kubenix ? (import ./.. { }).default }:
+{ system ? builtins.currentSystem
+, evalModules ? (import ../. { }).evalModules.${system}
+}:
+
+{ registry ? "docker.io/gatehub" }:
 
 {
-  nginx-deployment = import ./nginx-deployment { inherit kubenix; };
+  nginx-deployment = import ./nginx-deployment { inherit evalModules registry; };
 }
diff --git a/examples/nginx-deployment/default.nix b/examples/nginx-deployment/default.nix
index d47b1b0..42f1d96 100644
--- a/examples/nginx-deployment/default.nix
+++ b/examples/nginx-deployment/default.nix
@@ -1,30 +1,36 @@
-{ kubenix ? import ../.. { }, registry ? "docker.io/gatehub" }:
+{ evalModules, registry }:
 
-with kubenix.lib;
-
-rec {
+let
   # evaluated configuration
-  config = (kubenix.evalModules {
+  config = (evalModules {
     modules = [
+
+      ({ kubenix, ... }: { imports = [ kubenix.modules.testing ]; })
+
       ./module.nix
+
       { docker.registry.url = registry; }
 
-      kubenix.modules.testing
       {
         testing.tests = [ ./test.nix ];
-        testing.defaults = ({ lib, ... }: with lib; {
-          docker.registry.url = mkForce "";
-          kubernetes.version = config.kubernetes.version;
-        });
+        testing.docker.registryUrl = "";
       }
+
     ];
   }).config;
 
-  # e2e test
-  test = config.testing.result;
+in
+{
+  inherit config;
+
+  # config checks
+  checks = config.testing.success;
+
+  # TODO: e2e test
+  # test = config.testing.result;
 
   # nixos test script for running the test
-  test-script = config.testing.testsByName.nginx-deployment.test;
+  test-script = config.testing.testsByName.nginx-deployment.script;
 
   # genreated kubernetes List object
   generated = config.kubernetes.generated;
diff --git a/flake.nix b/flake.nix
index 9b00cf2..a3fd895 100644
--- a/flake.nix
+++ b/flake.nix
@@ -21,9 +21,39 @@
           config = { allowUnsupportedSystem = true; };
         };
 
+        lib = pkgs.lib;
+
+        kubenix = {
+          lib = import ./lib { inherit lib pkgs; };
+          evalModules = self.evalModules.${system};
+          modules = self.modules;
+        };
+
+        # evalModules with same interface as lib.evalModules and kubenix as
+        # special argument
+        evalModules = attrs@{ module ? null, modules ? [ module ], ... }:
+          let
+            lib' = lib.extend (lib: self: import ./lib/upstreamables.nix { inherit lib pkgs; });
+            attrs' = builtins.removeAttrs attrs [ "module" ];
+          in
+          lib'.evalModules (lib.recursiveUpdate
+            {
+              inherit modules;
+              specialArgs = { inherit kubenix; };
+              args = {
+                inherit pkgs;
+                name = "default";
+              };
+            }
+            attrs');
+
       in
       {
 
+        inherit evalModules;
+
+        jobs = import ./jobs { inherit pkgs; };
+
         devShell = with pkgs; devshell.mkShell
           { imports = [ (devshell.importTOML ./devshell.toml) ]; };
 
@@ -31,9 +61,22 @@
           inherit (pkgs) kubernetes kubectl;
         };
 
-        defaultPackage = pkgs.kubenix;
-
-        jobs = import ./jobs { inherit pkgs; };
+        checks = let
+          wasSuccess = suite:
+            if suite.success == true
+            then pkgs.runCommandNoCC "testing-suite-config-assertions-for-${suite.name}-succeeded" {} "echo success > $out"
+            else pkgs.runCommandNoCC "testing-suite-config-assertions-for-${suite.name}-failed" {} "exit 1";
+          mkExamples = attrs: (import ./examples { inherit evalModules; })
+            ({ registry = "docker.io/gatehub"; } // attrs);
+          mkK8STests = attrs: (import ./tests { inherit evalModules; })
+            ({ registry = "docker.io/gatehub"; } // attrs);
+        in {
+          # TODO: access "success" derivation with nice testing utils for nice output
+          nginx-example = wasSuccess (mkExamples { }).nginx-deployment.config.testing;
+          tests-k8s-1_19 = wasSuccess (mkK8STests { k8sVersion = "1.19"; });
+          tests-k8s-1_20 = wasSuccess (mkK8STests { k8sVersion = "1.20"; });
+          tests-k8s-1_21 = wasSuccess (mkK8STests { k8sVersion = "1.21"; });
+        };
 
       }
     ))
@@ -41,9 +84,9 @@
     //
 
     {
-      modules = import ./src/modules;
+      modules = import ./modules;
       overlay = final: prev: {
-        kubenix = prev.callPackage ./src/kubenix.nix { };
+        kubenix.evalModules = self.evalModules.${prev.system};
         # up to date versions of their nixpkgs equivalents
         kubernetes = prev.callPackage ./pkgs/applications/networking/cluster/kubernetes
           { };
diff --git a/src/lib/default.nix b/lib/default.nix
similarity index 100%
rename from src/lib/default.nix
rename to lib/default.nix
diff --git a/src/lib/docker/default.nix b/lib/docker/default.nix
similarity index 100%
rename from src/lib/docker/default.nix
rename to lib/docker/default.nix
diff --git a/src/lib/helm/chart2json.nix b/lib/helm/chart2json.nix
similarity index 100%
rename from src/lib/helm/chart2json.nix
rename to lib/helm/chart2json.nix
diff --git a/src/lib/helm/default.nix b/lib/helm/default.nix
similarity index 100%
rename from src/lib/helm/default.nix
rename to lib/helm/default.nix
diff --git a/src/lib/helm/fetchhelm.nix b/lib/helm/fetchhelm.nix
similarity index 100%
rename from src/lib/helm/fetchhelm.nix
rename to lib/helm/fetchhelm.nix
diff --git a/src/lib/helm/test.nix b/lib/helm/test.nix
similarity index 100%
rename from src/lib/helm/test.nix
rename to lib/helm/test.nix
diff --git a/src/lib/k8s/default.nix b/lib/k8s/default.nix
similarity index 100%
rename from src/lib/k8s/default.nix
rename to lib/k8s/default.nix
diff --git a/src/lib/upstreamables.nix b/lib/upstreamables.nix
similarity index 100%
rename from src/lib/upstreamables.nix
rename to lib/upstreamables.nix
diff --git a/src/modules/base.nix b/modules/base.nix
similarity index 100%
rename from src/modules/base.nix
rename to modules/base.nix
diff --git a/src/modules/default.nix b/modules/default.nix
similarity index 100%
rename from src/modules/default.nix
rename to modules/default.nix
diff --git a/src/modules/docker.nix b/modules/docker.nix
similarity index 100%
rename from src/modules/docker.nix
rename to modules/docker.nix
diff --git a/src/modules/generated/v1.19.nix b/modules/generated/v1.19.nix
similarity index 100%
rename from src/modules/generated/v1.19.nix
rename to modules/generated/v1.19.nix
diff --git a/src/modules/generated/v1.20.nix b/modules/generated/v1.20.nix
similarity index 100%
rename from src/modules/generated/v1.20.nix
rename to modules/generated/v1.20.nix
diff --git a/src/modules/generated/v1.21.nix b/modules/generated/v1.21.nix
similarity index 100%
rename from src/modules/generated/v1.21.nix
rename to modules/generated/v1.21.nix
diff --git a/src/modules/helm.nix b/modules/helm.nix
similarity index 100%
rename from src/modules/helm.nix
rename to modules/helm.nix
diff --git a/src/modules/istio-overrides.nix b/modules/istio-overrides.nix
similarity index 100%
rename from src/modules/istio-overrides.nix
rename to modules/istio-overrides.nix
diff --git a/src/modules/istio.nix b/modules/istio.nix
similarity index 100%
rename from src/modules/istio.nix
rename to modules/istio.nix
diff --git a/src/modules/k8s.nix b/modules/k8s.nix
similarity index 100%
rename from src/modules/k8s.nix
rename to modules/k8s.nix
diff --git a/src/modules/submodule.nix b/modules/submodule.nix
similarity index 100%
rename from src/modules/submodule.nix
rename to modules/submodule.nix
diff --git a/src/modules/submodules.nix b/modules/submodules.nix
similarity index 100%
rename from src/modules/submodules.nix
rename to modules/submodules.nix
diff --git a/src/modules/testing/default.nix b/modules/testing/default.nix
similarity index 100%
rename from src/modules/testing/default.nix
rename to modules/testing/default.nix
diff --git a/src/modules/testing/docker.nix b/modules/testing/docker.nix
similarity index 100%
rename from src/modules/testing/docker.nix
rename to modules/testing/docker.nix
diff --git a/src/modules/testing/driver/kubetest.nix b/modules/testing/driver/kubetest.nix
similarity index 100%
rename from src/modules/testing/driver/kubetest.nix
rename to modules/testing/driver/kubetest.nix
diff --git a/src/modules/testing/driver/kubetestdrv.nix b/modules/testing/driver/kubetestdrv.nix
similarity index 100%
rename from src/modules/testing/driver/kubetestdrv.nix
rename to modules/testing/driver/kubetestdrv.nix
diff --git a/src/modules/testing/evalTest.nix b/modules/testing/evalTest.nix
similarity index 100%
rename from src/modules/testing/evalTest.nix
rename to modules/testing/evalTest.nix
diff --git a/src/modules/testing/runtime/local.nix b/modules/testing/runtime/local.nix
similarity index 100%
rename from src/modules/testing/runtime/local.nix
rename to modules/testing/runtime/local.nix
diff --git a/src/modules/testing/runtime/nixos-k8s.nix b/modules/testing/runtime/nixos-k8s.nix
similarity index 100%
rename from src/modules/testing/runtime/nixos-k8s.nix
rename to modules/testing/runtime/nixos-k8s.nix
diff --git a/src/modules/testing/test-options.nix b/modules/testing/test-options.nix
similarity index 100%
rename from src/modules/testing/test-options.nix
rename to modules/testing/test-options.nix
diff --git a/release.nix b/release.nix
deleted file mode 100644
index 0f1a947..0000000
--- a/release.nix
+++ /dev/null
@@ -1,33 +0,0 @@
-let
-  fetch = import ./lib/compat.nix;
-in
-{ pkgs ? import (fetch "nixpkgs") { }
-, lib ? pkgs.lib
-, throwError ? true
-}:
-
-with lib;
-let
-  kubenix = import ./. { inherit pkgs; };
-
-  lib = kubenix.lib;
-
-  runK8STests = k8sVersion: import ./tests {
-    inherit pkgs lib kubenix k8sVersion throwError nixosPath;
-  };
-in
-rec {
-
-  tests = {
-    k8s-1_19 = runK8STests "1.19";
-    k8s-1_20 = runK8STests "1.20";
-    k8s-1_21 = runK8STests "1.21";
-  };
-
-  test-check =
-    if !(all (test: test.success) (attrValues tests))
-    then throw "tests failed"
-    else true;
-
-  examples = import ./examples { };
-}
diff --git a/src/kubenix.nix b/src/kubenix.nix
deleted file mode 100644
index 240c07a..0000000
--- a/src/kubenix.nix
+++ /dev/null
@@ -1,37 +0,0 @@
-{ pkgs, lib }:
-
-let
-
-  kubenix = {
-    inherit evalModules;
-    lib = import ./lib { inherit lib pkgs; };
-    modules = import ./modules;
-  };
-
-  defaultSpecialArgs = {
-    inherit kubenix;
-  };
-
-  # evalModules with same interface as lib.evalModules and kubenix as
-  # special argument
-  evalModules =
-    { module ? null
-    , modules ? [ module ]
-    , specialArgs ? defaultSpecialArgs
-    , ...
-    }@attrs:
-    let
-      lib' = lib.extend (lib: self: import ./lib/upstreamables.nix { inherit lib pkgs; });
-      attrs' = builtins.removeAttrs attrs [ "module" ];
-    in
-    lib'.evalModules (lib.recursiveUpdate
-      {
-        inherit specialArgs modules;
-        args = {
-          inherit pkgs;
-          name = "default";
-        };
-      }
-      attrs');
-in
-kubenix
diff --git a/tests/default.nix b/tests/default.nix
index 9b26103..0e596cb 100644
--- a/tests/default.nix
+++ b/tests/default.nix
@@ -1,22 +1,21 @@
-{ pkgs ? import <nixpkgs> { }
-, lib ? pkgs.lib
-, kubenix ? (import ../. { }).default
+{ system ? builtins.currentSystem
+, evalModules ? (import ../. { }).evalModules.${system}
+}:
 
-, k8sVersion ? "1.21"
-, registryUrl ? throw "Registry url not defined"
+{ k8sVersion ? "1.21"
+, registry ? throw "Registry url not defined"
 , throwError ? true # whether any testing error should throw an error
 , enabledTests ? null
 }:
 
-with lib;
 let
-  images = pkgs.callPackage ./images.nix { };
+  config = (evalModules {
 
-  config = (kubenix.evalModules {
     modules = [
-      kubenix.modules.testing
 
-      {
+      ({ kubenix, ... }: { imports = [ kubenix.modules.testing ]; })
+
+      ({ pkgs, ... }: {
         testing = {
           name = "kubenix-${k8sVersion}";
           throwError = throwError;
@@ -38,9 +37,9 @@ let
             ./submodules/passthru.nix
           ];
           args = {
-            inherit images;
+            images = pkgs.callPackage ./images.nix { };
           };
-          docker.registryUrl = registryUrl;
+          docker.registryUrl = registry;
           defaults = [
             {
               features = [ "k8s" ];
@@ -50,14 +49,10 @@ let
             }
           ];
         };
-      }
+      })
+
     ];
-    args = {
-      inherit pkgs;
-    };
-    specialArgs = {
-      inherit kubenix;
-    };
+
   }).config;
 in
-pkgs.recurseIntoAttrs config.testing
+config.testing // { recurseForDerivations = true; }