restore nix for docs build

default.nix

@@ -1,26 +1,54 @@
 {
-  dpdk-sys,
-  buildPkgs ? (import ./outside.nix {}).muslEnv,
-  toolPkgs ? import <nixpkgs> {},
+  pkgs ? import <nixpkgs> { },
 }: rec {
 
-  inherit buildPkgs;
-
   project-name = "hedgehog-dataplane";
 
-  toolchain = toolPkgs.buildEnv {
-    name = "${project-name}-toolchain";
-    paths = toolchainPackages { pkgs = toolPkgs; };
-    pathsToLink = [ "/" ];
-  };
+  inherit pkgs;
+
+  mdbook-citeproc = import ./nix/mdbook-citeproc.nix (with pkgs; {
+  	inherit lib stdenv fetchFromGitHub rustPlatform CoreServices;
+  });
+
+  mdbook-alerts = import ./nix/mdbook-alerts.nix (with pkgs; {
+	inherit lib stdenv fetchFromGitHub rustPlatform CoreServices;
+  });
+
+  buildDeps = pkgs: (with pkgs; [
+    bash
+    bash-completion
+    coreutils
+    git
+    mdbook
+    mdbook-admonish
+    mdbook-katex
+    mdbook-mermaid
+    mdbook-plantuml
+    pandoc # needed for mdbook-citeproc to work (runtime exe dep)
+    plantuml # needed for mdbook-plantuml to work (runtime exe dep)
+  ]) ++ [
+    mdbook-citeproc
+    mdbook-alerts
+  ];
 
-  shell = toolPkgs.mkShell {
+  shell = pkgs.buildFHSUserEnv {
     name = "${project-name}-shell";
-    packages = (toolchainPackages toolPkgs);
-    shellHook = ''
-      export PS1="\[\e[1;32m\][${project-name}]\[\e[0m\] $PS1"
-      export LIBCLANG_PATH=${toolPkgs.llvmPackages.libclang.lib}/lib
-      export LD_LIBRARY_PATH=$LIBCLANG_PATH:$LD_LIBRARY_PATH
+    targetPkgs = buildDeps;
+  };
+
+  design-docs = pkgs.stdenv.mkDerivation {
+    name = "${project-name}-design-docs";
+    src = ./design-docs/src/mdbook;
+    buildInputs = buildDeps pkgs;
+    buildPhase = ''
+      set -euo pipefail;
+      rm --force --recursive book;
+      mdbook build;
+    '';
+    installPhase = ''
+      set -euo pipefail;
+      cp -a book $out;
     '';
   };
+
 }

flake.nix

@@ -1,6 +1,5 @@
-# This is currently scratch work while I figure out how to build this project with flakes
 {
-  description = "Hedgehog dataplane scratch flake";
+  description = "Hedgehog dataplane";
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
@@ -12,13 +11,11 @@
     flake-utils.lib.eachDefaultSystem (system:
       let
         pkgs = nixpkgs.legacyPackages.${system};
-        build-flags = (import ./nix/flags.nix).release;
-        overlays = (import ./nix/overlays.nix { inherit build-flags; });
-        buildPkgs = (import ./nix/outside.nix { inherit pkgs overlays; }).muslEnv;
-        defaultBuild = (import ./default.nix { inherit buildPkgs; toolPkgs = pkgs; });
-      in {
-        defaultPackage = defaultBuild.dpdk;
-#        defaultPackage = build-flags;
+        default = import ./default.nix { inherit pkgs; };
+      in
+      {
+        devShell = default.shell;
+        packages.design-docs = default.design-docs;
       }
     );
 }