feature(nix): finalise flake

flake.lock

@@ -625,22 +625,6 @@
         "type": "github"
       }
     },
-    "nixpkgs_2": {
-      "locked": {
-        "lastModified": 1723400035,
-        "narHash": "sha256-WoKZDlBEdMhP+hjquBAh0BhUJbcH2+U8g2mHOr1mv8I=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "a731b45590a5169542990c36ffcde6cebd9a3356",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-24.05",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
     "old-ghc-nix": {
       "flake": false,
       "locked": {
@@ -661,7 +645,10 @@
     "root": {
       "inputs": {
         "haskellNix": "haskellNix",
-        "nixpkgs": "nixpkgs_2",
+        "nixpkgs": [
+          "haskellNix",
+          "nixpkgs-unstable"
+        ],
         "utils": "utils"
       }
     },

flake.nix

@@ -3,7 +3,7 @@
 
   inputs = {
     haskellNix.url = "github:input-output-hk/haskell.nix";
-    nixpkgs.url = "github:NixOS/nixpkgs/?ref=nixos-24.05";
+    nixpkgs.follows = "haskellNix/nixpkgs-unstable";
     utils.url = "github:numtide/flake-utils";
   };
 

outputs.nix

@@ -6,25 +6,66 @@
 } @ inputs:
 utils.lib.eachDefaultSystem (
   system: let
-    overlay = self: _: {
-      hsPkgs = self.haskell-nix.project' rec {
-        src = ./.;
-        compiler-nix-name = "ghc910";
-      };
-    };
-    pkgs = import nixpkgs {
-      inherit system;
     overlays = [
       haskellNix.overlay
-        overlay
+      (final: prev: {
+        hakyllProject = final.haskell-nix.project' {
+          src = ./.;
+          compiler-nix-name = "ghc910";
+          shell.buildInputs = [
+            skeleton-web
           ];
+          shell.tools = {
+            cabal = "latest";
+            hlint = "latest";
+            haskell-language-server = "latest";
+          };
+        };
+      })
+    ];
+    pkgs = import nixpkgs {
+      inherit overlays system;
+      inherit (haskellNix) config;
+    };
+    flake = pkgs.hakyllProject.flake {};
+    skeleton-web = flake.packages."skeleton-web:exe:site";
+    hakyll-skeleton = pkgs.stdenv.mkDerivation {
+      name = "hakyll-skeleton";
+      buildInputs = [];
+      src =
+        pkgs.nix-gitignore.gitignoreSourcePure [
+          ./.gitignore
+          ".git"
+          ".github"
+        ]
+        ./.;
+
+      # LANG and LOCALE_ARCHIVE are fixes pulled from the community:
+      LANG = "en_AU.UTF-8";
+      LOCALE_ARCHIVE =
+        pkgs.lib.optionalString
+        (pkgs.buildPlatform.libc == "glibc")
+        "${pkgs.glibcLocales}/lib/locale/locale-archive";
+
+      buildPhase = ''
+        ${skeleton-web}/bin/site build --verbose
+      '';
+
+      installPhase = ''
+        mkdir -p "$out/dist"
+        cp -a dist/. "$out/dist"
+      '';
     };
-    flake = pkgs.hsPkgs.flake {};
   in {
-    packages.default = flake.packages."skeleton-web:exe:site";
-    apps.default = {
-      type = "app";
-      program = "${flake.packages."skeleton-web:exe:site"}/bin/site";
+    packages = {
+      inherit skeleton-web hakyll-skeleton;
+      default = hakyll-skeleton;
+    };
+    apps = {
+      default = utils.lib.mkApp {
+        drv = skeleton-web;
+        exePath = "/bin/skeleton-web";
+      };
     };
     # Overwrite devShells being inported from haskell-nix
     devShells.default = pkgs.callPackage ./shell.nix {

shell.nix

@@ -8,6 +8,7 @@ with pkgs;
     buildInputs = [
       alejandra # The Uncompromising Nix Code Formatter
       haskell.compiler.ghc910 # The Glasgow Haskell Compiler
+      haskellPackages.hakyll # A static website compiler library
       nix # Powerful package manager, makes packaging reliable & reproducible
       stylish-haskell # A simple Haskell code prettifier
       tea # Gitea official CLI client

skeleton-web.cabal

@@ -7,6 +7,6 @@ executable site
   main-is:          site.hs
   build-depends:    base == 4.*
                   , hakyll == 4.16.*
-                  , filepath == 1.4.*
+                  , filepath == 1.5.*
   ghc-options:      -threaded
   default-language: Haskell2010