diff --git a/flake.nix b/flake.nix
index bd27d8d..d733b4d 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,7 +1,7 @@
 {
   edition = 201909;
 
-  description = "Genode package overlay";
+  description = "Genode packages";
 
   inputs = {
     nixpkgs.uri = "git+https://gitea.c3d2.de/ehmry/nixpkgs.git";
@@ -10,28 +10,24 @@
   };
 
   outputs = { self, nixpkgs, dhall-haskell }:
-    let fullPkgs = import ./packages.nix { nixpkgs = import nixpkgs; };
+    let
+      nixpkgs' = import nixpkgs;
+      systems = [ "x86_64-genode" ];
+
+      forAllSystems = f: nixpkgs.lib.genAttrs systems (system: f system);
+
     in {
 
-      packages = with fullPkgs; {
-        inherit stdenv nova genode-os genode-base genode-base-nova
-          genode-base-linux solo5;
-      };
+      packages = forAllSystems (system:
+        import ./packages.nix {
+          inherit system;
+          nixpkgs = nixpkgs';
+        });
 
-      defaultPackage = self.packages.genode-os;
-
-      hydraJobs = {
-        build.x86_64 = {
-          inherit (self.packages)
-            nova stdenv solo5 genode-base-linux genode-base-nova genode-os;
-        };
-        tests = import ./tests {
+      checks = forAllSystems (system:
+        import ./tests {
           inherit nixpkgs dhall-haskell;
-          genodepkgs = fullPkgs;
-        };
-      };
-
-      checks = { inherit (self.hydraJobs.tests.x86_64.nova) pci; };
+          genodepkgs = builtins.getAttr system self.packages;
+        });
     };
 }
-
diff --git a/packages.nix b/packages.nix
index 826a8de..3d08bd2 100644
--- a/packages.nix
+++ b/packages.nix
@@ -2,36 +2,35 @@
 #
 # SPDX-License-Identifier: LicenseRef-Hippocratic-1.1
 
-let
-  nativeOverlay = self: super:
-    # Overlay of locally defined packages
-    with self;
-    let
-      genode = (callPackage ./upstream { } // {
-        libc = callPackage ./pkgs/libc { };
-        nic_bus = callPackage ./pkgs/nic_bus { };
-      });
-      dhallPackages = super.dhallPackages // (callPackage ./dhall { });
-    in {
-      genode-base = genode.base;
-      genode-base-linux = genode.base-linux;
-      genode-base-nova = genode.base-nova;
-      genode-os = genode.os;
-      depot = callPackage ./depot { };
-      dhallGenode = dhallPackages.genode;
-      dhallPrelude = dhallPackages.prelude;
-      nova = callPackage ./NOVA { };
-      solo5 = callPackage ./pkgs/solo5 { };
-    };
+{ system ? "x86_64-genode", nixpkgs ? import <nixpkgs>, extraOverlays ? [ ] }:
 
+let
   toolchainOverlay = import ./toolchain-overlay;
   # Overlay of toolchain patches
 
-in { nixpkgs ? import <nixpkgs>, extraOverlays ? [ ] }:
+  super = nixpkgs {
+    # Evaluate an overlayed Nixpkgs for a Genode target
+    localSystem = "x86_64-linux";
+    crossSystem = "x86_64-genode";
+    overlays = [ toolchainOverlay ] ++ extraOverlays;
+  };
 
-nixpkgs {
-  # Evaluate an overlayed Nixpkgs for a Genode target
-  localSystem = "x86_64-linux";
-  crossSystem = "x86_64-genode";
-  overlays = [ toolchainOverlay nativeOverlay ] ++ extraOverlays;
+  inherit (super) callPackage;
+
+  genode = (callPackage ./upstream { } // {
+    libc = callPackage ./pkgs/libc { };
+    nic_bus = callPackage ./pkgs/nic_bus { };
+  });
+  dhallPackages = super.dhallPackages // (callPackage ./dhall { });
+in rec {
+  inherit (super) stdenv;
+  genode-base = genode.base;
+  genode-base-linux = genode.base-linux;
+  genode-base-nova = genode.base-nova;
+  genode-os = genode.os;
+
+  dhallGenode = dhallPackages.genode;
+  dhallPrelude = dhallPackages.prelude;
+  nova = callPackage ./NOVA { };
+  solo5 = callPackage ./pkgs/solo5 { inherit genode-base genode-os; };
 }
diff --git a/tests/default.nix b/tests/default.nix
index 8439fde..effac0a 100644
--- a/tests/default.nix
+++ b/tests/default.nix
@@ -8,7 +8,7 @@ let
     libc = call ./libc.nix { };
     log = call ./log.nix { };
     signal = call ./signal.nix { };
-    solo5 = call ./solo5 { };
+    # solo5 = call ./solo5 { };
   };
 
 in { genodepkgs, nixpkgs, dhall-haskell }:
@@ -18,6 +18,7 @@ let
     system = "x86_64-linux";
     overlays = [ (self: super: { inherit (dhall-haskell.packages) dhall; }) ];
   };
+  depot = hostPkgs.callPackage ../depot { };
   testPkgs = genodepkgs;
 
   lib = hostPkgs.lib // {
@@ -50,11 +51,19 @@ let
       '';
   };
 
-in {
-  x86_64 = {
-    linux = tests
-      (import ./driver-linux.nix { inherit testPkgs hostPkgs lib; }).callTest;
-    nova = (call: ((tests call) // { pci = call ./pci.nix { }; }))
-      (import ./driver-nova.nix { inherit testPkgs hostPkgs lib; }).callTest;
-  };
-}
+  linux = tests (import ./driver-linux.nix {
+    inherit testPkgs hostPkgs lib depot;
+  }).callTest;
+
+  nova = (call: ((tests call) // { pci = call ./pci.nix { }; }))
+    (import ./driver-nova.nix {
+      inherit testPkgs hostPkgs lib depot;
+    }).callTest;
+
+  testsToList = tests:
+    map (test: {
+      inherit (test) name;
+      value = test;
+    }) (builtins.attrValues tests);
+
+in with builtins; listToAttrs (concatLists (map (testsToList) [ linux nova ]))
diff --git a/tests/driver-linux.nix b/tests/driver-linux.nix
index fb1a742..8bfaa9c 100644
--- a/tests/driver-linux.nix
+++ b/tests/driver-linux.nix
@@ -2,7 +2,7 @@
 #
 # SPDX-License-Identifier: LicenseRef-Hippocratic-1.1
 
-{ testPkgs, hostPkgs, lib }:
+{ testPkgs, hostPkgs, lib, depot }:
 
 let
   testDriver = with hostPkgs;
@@ -23,7 +23,7 @@ let
 
   runTests = driver:
     hostPkgs.stdenv.mkDerivation {
-      name = "test-run-${driver.testName}";
+      name = "linux-"+driver.testName;
       preferLocalBuild = true;
 
       buildCommand = ''
@@ -42,10 +42,10 @@ let
       bootModules' = {
         inherit testConfig;
         config = ./driver-config.xml;
-        core = "${genode.base-linux}/bin/core-linux";
-        init = "${genode.os}/bin/init";
+        core = "${genode-base-linux}/bin/core-linux";
+        init = "${genode-os}/bin/init";
         "ld.lib.so" = "${depot.base-linux}/lib/ld.lib.so";
-        timer = "${genode.base-linux}/bin/linux_timer_drv";
+        timer = "${genode-base-linux}/bin/linux_timer_drv";
       } // bootModules;
 
       baseSetup = with builtins;
@@ -92,5 +92,6 @@ in {
         isNova = false;
       };
       pkgs = testPkgs;
+      inherit depot;
     } // args));
 }
diff --git a/tests/driver-nova.nix b/tests/driver-nova.nix
index 76d6b66..963aaaa 100644
--- a/tests/driver-nova.nix
+++ b/tests/driver-nova.nix
@@ -2,7 +2,7 @@
 #
 # SPDX-License-Identifier: LicenseRef-Hippocratic-1.1
 
-{ testPkgs, hostPkgs, lib }:
+{ testPkgs, hostPkgs, lib, depot }:
 
 let
   testDriver = with hostPkgs;
@@ -23,7 +23,7 @@ let
 
   runTests = driver:
     hostPkgs.stdenv.mkDerivation {
-      name = "test-run-${driver.testName}";
+      name = "nova-"+driver.testName;
       preferLocalBuild = true;
 
       buildCommand = ''
@@ -147,5 +147,6 @@ in {
         isNova = true;
       };
       pkgs = testPkgs;
+      inherit depot;
     } // args));
 }
diff --git a/tests/fs_report.nix b/tests/fs_report.nix
index d3ccc8d..b4f6a5b 100644
--- a/tests/fs_report.nix
+++ b/tests/fs_report.nix
@@ -1,4 +1,4 @@
-{ testEnv, pkgs }:
+{ testEnv, pkgs, ... }:
 with pkgs;
 
 testEnv.mkTest {
@@ -8,11 +8,11 @@ testEnv.mkTest {
   testConfig = ./fs_report.xml;
 
   bootModules = {
-    fs_report = "${genode.os}/bin/fs_report";
-    fs_rom = "${genode.os}/bin/fs_rom";
-    ram_fs = "${genode.os}/bin/ram_fs";
-    test-fs_report = "${genode.os}/bin/test-fs_report";
-    "vfs.lib.so" = "${genode.os}/lib/vfs.lib.so";
+    fs_report = "${genode-os}/bin/fs_report";
+    fs_rom = "${genode-os}/bin/fs_rom";
+    ram_fs = "${genode-os}/bin/ram_fs";
+    test-fs_report = "${genode-os}/bin/test-fs_report";
+    "vfs.lib.so" = "${genode-os}/lib/vfs.lib.so";
   };
 
   testScript = ''
diff --git a/tests/libc.nix b/tests/libc.nix
index 2a3afb3..d7a6f2c 100644
--- a/tests/libc.nix
+++ b/tests/libc.nix
@@ -1,4 +1,4 @@
-{ testEnv, pkgs }:
+{ testEnv, pkgs, depot }:
 with pkgs;
 
 testEnv.mkTest rec {
@@ -12,7 +12,7 @@ testEnv.mkTest rec {
     "libm.lib.so" = "${depot.libc}/lib/libm.lib.so";
     "posix.lib.so" = "${depot.posix}/lib/posix.lib.so";
     "test-libc" = "${depot.test-libc}/bin/test-libc";
-    "vfs.lib.so" = "${genode.os}/lib/vfs.lib.so";
+    "vfs.lib.so" = "${genode-os}/lib/vfs.lib.so";
   };
 
   qemuMem = 384;
diff --git a/tests/log.nix b/tests/log.nix
index 486b2f6..ead29cc 100644
--- a/tests/log.nix
+++ b/tests/log.nix
@@ -1,4 +1,4 @@
-{ testEnv, pkgs }:
+{ testEnv, pkgs, ... }:
 with pkgs;
 
 testEnv.mkTest rec {
@@ -7,7 +7,7 @@ testEnv.mkTest rec {
 
   testConfig = testEnv.lib.renderDhallInit ./log.dhall "{=}";
 
-  bootModules.test-log = "${genode.base}/bin/test-log";
+  bootModules.test-log = "${genode-base}/bin/test-log";
 
   testScript = "run_genode_until {Test done.} 10";
 }
diff --git a/tests/pci.nix b/tests/pci.nix
index 2e200ab..5bf7bb9 100644
--- a/tests/pci.nix
+++ b/tests/pci.nix
@@ -1,4 +1,4 @@
-{ testEnv, pkgs }:
+{ testEnv, pkgs, ... }:
 with pkgs;
 
 testEnv.mkTest {
diff --git a/tests/signal.nix b/tests/signal.nix
index 5c99b57..259126c 100644
--- a/tests/signal.nix
+++ b/tests/signal.nix
@@ -1,4 +1,4 @@
-{ testEnv, pkgs }:
+{ testEnv, pkgs, ... }:
 with pkgs;
 
 testEnv.mkTest rec {
@@ -7,7 +7,7 @@ testEnv.mkTest rec {
 
   testConfig = testEnv.lib.renderDhallInit ./signal.dhall "{=}";
 
-  bootModules.test-signal = "${genode.os}/bin/test-signal";
+  bootModules.test-signal = "${genode-os}/bin/test-signal";
 
   testScript = "run_genode_until {--- Signalling test finished ---} 120";
 }