Update flake attributes, README, cleanup

Thanks to Dan Connolly for noticing deprecated formating in the flake.

README.md

@@ -19,10 +19,16 @@
 
 **SoTest:** https://opensource.sotest.io/userName%3Demery/1
 
+## Repository layout
+
+ - Native packages are at [packages](./packages/default.nix)
+
+ - Existing Nixpkgs packages are patched at [overlay](./overlay/default.nix)
+
+ - Tests are at [tests](./tests/default.nix) (messy)
+
 # Contributing
 
-At the moment every user needs to also act as distro developer, designing how
-packaging works needs to be done before packages can be submitted in bulk.
 Patches can be submitted and issues reported via the
 [mailing list](https://lists.sr.ht/~ehmry/genodepkgs). The mailing list is the
 minimum viable mechanism for community development, and may be replaced later.
@@ -31,36 +37,23 @@ The worksites at the moment are:
 
  - Documentation
 
- - Port tests to the NixOS test harness.
+ - ARM, i686
 
- - Patching standard Nixpkgs packages via an overlay. Workflow and tooling
-   needs to be explored for building emulated UNIX environments.
+ - Write a proper test framework, or better, reuse the NixOS one.
+
+ - Patching standard Nixpkgs packages by overlay. Explore Workflow and tooling 
+   for building emulated UNIX environments.
 
  - LLVM testing and upstreaming patches.
 
  - Formalizing Dhall configuration types.
 
- - Configuration validation via a service routing prover.
-
-
-# Packaging
-
-Packaging is done using standard Nixpkgs methods, a `stdenv` is available for
-cross-compilation. See [Solo5](./packages/solo5/default.nix) as an example.
-
-
-# System description format
-
-The high-level interface to system building are boot descriptions. These Dhall
-documents describe the configuration of an [Init](https://genode.org/documentation/genode-foundations/19.05/system_configuration/The_init_component.html)
-instance and a store of ROM (Read-Only Memory) modules. These description can be
-used to build firmware-like binary images or merged and nested within other
-descriptions. In theory these descriptions can arrange file-systems, but those
-functions are missing.
-
-The description schema is documented as code:
-https://git.sr.ht/~ehmry/dhall-genode/tree/master/Boot/package.dhall
+ - NixOS modules for constructing a reasonably usable Genode system. Reusing the 
+   module system from NixOS is advantagous because a dual boot system can 
+   share a `/nix/store` and be updated simultaneously. Work-in-progress on a 
+   topic branch.
 
+ - Configuration validation via a service routing prover.
 
 # Nix Flakes
 
@@ -70,21 +63,34 @@ introduction and tutorial.
 
 ## Build Caching
 
+The builds produced by Hydra are available as a binary cache, using the cache is 
+strongly recommended.
+
+The global (IPv6 only) address for the cache can be tested by fetching the 
+following: http://cache.server7.hq.c3d2.de/nix-cache-info.
+
+If that fails the cache is also available within the
+[Yggdrasil](https://yggdrasil-network.github.io/) network:
+http://nix-serve.y.c3d2.de/nix-cache-info.
+
 Those with IPv6 will want to the following to their */etc/nix/nix.conf* file:
 
 ```
-substituters = https://cache.nixos.org/ https://cache.server7.hq.c3d2.de/
+substituters = https://cache.nixos.org https://cache.server7.hq.c3d2.de
 trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= cache.server7.hq.c3d2.de:x8JLRG26zRZ8ysYZLEkPxuAYuK1VSJi/aMAEIs2Lv+U=
 ```
 
-
 NixOS users may alternatively using the following configuration:
 
 ```nix
 { pkgs, ... }:
 {
   # The following enables the use of a binary cache (IPv6 only)
-  nix.binaryCaches = [ "https://cache.server7.hq.c3d2.de" ];
+  nix.binaryCaches = [
+    "https://cache.nixos.org"
+    "https://cache.server7.hq.c3d2.de"
+    # or "http://nix-serve.y.c3d2.de"
+  ];
   nix.binaryCachePublicKeys = [
     "cache.server7.hq.c3d2.de:x8JLRG26zRZ8ysYZLEkPxuAYuK1VSJi/aMAEIs2Lv+U="
   ];
@@ -102,6 +108,11 @@ $ nix build .#checks.x86_64-linux.nova-x86
 $ nix log .#checks.x86_64-linux.nova-x86
 ```
 
+# Packaging
+
+Packaging is done using standard Nixpkgs methods, a `stdenv` is available for
+cross-compilation. See [Solo5](./packages/solo5/default.nix) as an example.
+
 # Toolchain
 
 The Genode Labs toolchain is available here only for Linux and in binary form.
@@ -116,14 +127,6 @@ nix run .#legacyPackages.x86_64-linux-x86_64-genode.stdenv.cc
 x86_64-unknown-genode-clang++ -v
 ```
 
-# Building
-
-Bootstrapping the build tooling can take several hours on a laptop, therefore it
-is recommended enable the binary caches and to farm massive rebuilds to large
-multicore machines. The Nix flake is prepared for continuous builds with a
-[Hydra](https://nixos.org/hydra/), but only the experimental flakes capable
-Hydra.
-
 # Testing
 
 Tests are performed using QEMU, the test artifacts are built as follows:
@@ -142,6 +145,18 @@ nix build .#checks.x86_64-linux.nova-x86.store
 nix build .#checks.x86_64-linux.nova-x86.config
 ```
 
+# System description format
+
+The high-level interface to system building are boot descriptions. These Dhall
+documents describe the configuration of an [Init](https://genode.org/documentation/genode-foundations/19.05/system_configuration/The_init_component.html)
+instance and a store of ROM (Read-Only Memory) modules. These description can be
+used to build firmware-like binary images or merged and nested within other
+descriptions. In theory these descriptions can arrange file-systems, but those
+functions are missing.
+
+The description schema is documented as code:
+https://git.sr.ht/~ehmry/dhall-genode/tree/master/Boot/package.dhall
+
 # Tips and tricks
 
 ## How to build a Genode make target?
@@ -203,18 +218,6 @@ within the Genode source tree is an *explicit input hash* and the output of
 the port preparation is non-deterministic.
 
 
-## Render a Dhall Init configuration to XML
-
-```shell
-echo ./config.dhall | nix app genodepkgs#render-init > config.xml
-```
-
-## Build a Genode Labs Make target
-
-```shell
-nix app genodepkgs#genode-make "test/bomb"
-```
-
 ## Enter an environment compatible with the Genode Labs build scripts
 
 ```shell

flake.nix

@@ -1,11 +1,9 @@
 # SPDX-License-Identifier: CC0-1.0
 
 {
-  edition = 201909;
-
   description = "Genode packages";
 
-  inputs.nixpkgs.uri = "github:ehmry/nixpkgs?ref=genode";
+  inputs.nixpkgs.url = "github:ehmry/nixpkgs?ref=genode";
 
   outputs = { self, nixpkgs }:
     let

tool/setup-hooks.sh

@@ -1,7 +0,0 @@
-addGenodePkgConfigPath () {
-    if test -e "$1/.genode" && test -d "$1/lib/pkgconfig"; then
-        export PKG_CONFIG_PATH="$PKG_CONFIG_PATH:$1/lib/pkgconfig"
-    fi
-}
-
-addEnvHooks "$targetOffset" addGenodePkgConfigPath