Add flake.nix with package

.gitignore

@@ -17,6 +17,7 @@ xmlerrors
 .idea
 /cmake-build*
 .cache
+/result
 #index.theme is currently generated in the source dir
 icons/index.theme
 icons-dark/index.theme

flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1783224372,
+        "narHash": "sha256-8i/87eeoqiGE4yOTjwSA3Eh/ziJRQEmd/unYU+K27sk=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "d407951447dcd00442e97087bf374aad70c04cea",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,45 @@
+{
+  description = "Breeze icons for docpond – processed icon set for document/mime-type association";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+  };
+
+  outputs = { self, nixpkgs }: let
+    # Supported systems
+    systems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
+    forAllSystems = nixpkgs.lib.genAttrs systems;
+    pkgsFor = system: nixpkgs.legacyPackages.${system};
+  in {
+    packages = forAllSystems (system: let
+      pkgs = pkgsFor system;
+    in {
+      default = pkgs.stdenv.mkDerivation {
+        pname = "breeze-icons-for-docpond";
+        version = "0.1.0";
+        src = self;
+
+        nativeBuildInputs = [ pkgs.python3 ];
+
+        buildPhase = ''
+          runHook preBuild
+
+          # Patch the script so it writes directly to $out instead of hard-coded 'out/'
+          substituteInPlace process_icons.py \
+            --replace-fail "Path('out')" "Path(os.environ['out'])"
+
+          python3 process_icons.py
+
+          runHook postBuild
+        '';
+
+        # The script already placed everything in $out during buildPhase
+        installPhase = "true";
+
+        # No strip, no fixup – we're delivering SVG icons, not executables
+        dontFixup = true;
+        dontStrip = true;
+      };
+    });
+  };
+}