convert to flakes

README.md

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+# nmd
+
+Fork of [rycee/nmd](https://gitlab.com/rycee/nmd/) with theming options and flake support.
+
+## Usage
+
+Add flake input.
+
+```nix
+{
+  inputs = {
+    nixpkgs.url = github:nixos/nixpkgs/nixpkgs-unstable;
+
+    nmd = {
+      url = github:gvolpe/nmd;
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+}
+```
+
+Add overlay.
+
+```nix
+{
+  pkgs = import nixpkgs {
+    inherit system;
+    overlays = [ inputs.nmd.overlays.default ];
+  };
+}
+```
+
+Use the functions provided in the `pkgs.nmd` set, e.g.
+
+```nix
+{
+  docs = pkgs.nmd.buildDocBookDocs {
+    pathName = "super-cool-flake";
+    projectName = "My super cool project";
+    modulesDocs = [ modulesDocs ];
+    documentsDirectory = ./.;
+    documentType = "book";
+    theme = "night-owl";
+  };
+}
+```

flake.nix

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+{
+  description = "nmd: NixOS Module Documentation";
+
+  inputs.nixpkgs.url = github:nixos/nixpkgs/nixpkgs-unstable;
+
+  outputs = { self, nixpkgs }:
+    {
+      overlays.default = f: p: {
+        nmd = p.callPackage ./builders.nix { };
+      };
+    };
+}