Initial flake hub – oleks

flake.nix

@@ -0,0 +1,33 @@
+{
+  description = "oleks's personal Flake hub – a place to publish custom packages and overlays";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+
+  outputs =
+    { self, nixpkgs, ... }:
+    let
+      system = "x86_64-linux";
+      pkgs = import nixpkgs { inherit system; };
+    in
+    {
+      packages.${system}.hello-world = pkgs.callPackage ./packages/hello-world.nix { };
+
+      overlays.default = final: prev: {
+        hello-world = final.callPackage ./packages/hello-world.nix { };
+      };
+
+      devShells.${system}.default = pkgs.mkShell {
+        name = "oleks-hub-shell";
+        buildInputs = [ self.packages.${system}.hello-world ];
+        nativeBuildInputs = with pkgs; [
+          nix
+          fmt
+        ];
+        shellHook = ''
+          echo "Welcome to the oleks Flake hub development shell."
+        '';
+      };
+    };
+}

packages/hello-world.nix

@@ -0,0 +1,23 @@
+{ stdenv }:
+
+stdenv.mkDerivation {
+  pname = "hello-world";
+  version = "1.0.0";
+
+  src = builtins.fetchurl {
+    url = "https://raw.githubusercontent.com/NixOS/nixpkgs/master/pkgs/tools/hello/hello.c";
+    sha256 = "1p9sc9h1b6k7bk25n5g0w9gwy6fxlkchr5hpmxczg4bvp6jv93q6";
+  };
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp $src $out/bin/hello-world
+    chmod +x $out/bin/hello-world
+  '';
+
+  meta = with stdenv.lib; {
+    description = "A tiny hello‑world program used as an example package";
+    license = licenses.bsd2;
+    platforms = platforms.unix;
+  };
+}