first commit

.gitignore

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+result
+*/result

hello/default.nix

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+let 
+  nixpkgs = fetchTarball "https://github.com/NixOS/nixpkgs/tarball/nixos-25.11";
+  pkgs = import nixpkgs { config = {}; overlays = []; };
+in 
+{
+  hello = pkgs.callPackage ./hello.nix { };
+  icat = pkgs.callPackage ./icat.nix { };
+}

hello/hello.nix

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+{ 
+  stdenv, 
+  fetchzip, 
+}:
+
+stdenv.mkDerivation {
+  pname = "hello";
+  version = "2.12.1";
+
+  src = fetchzip {
+    url = "https://ftp.gnu.org/gnu/hello/hello-2.12.1.tar.gz";
+    sha256 = "sha256-1kJjhtlsAkpNB7f6tZEs+dbKd8z7KoNHyDHEJ0tmhnc=";
+  };
+}

hello/icat.nix

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+{ 
+  stdenv, 
+  fetchFromGitHub, 
+  imlib2,
+  xorg
+}:
+
+stdenv.mkDerivation {
+  pname = "icat";
+  version = "v0.5";
+
+  src = fetchFromGitHub {
+    owner = "atextor";
+    repo = "icat";
+    rev = "v0.5";
+    sha256 = "0wyy2ksxp95vnh71ybj1bbmqd5ggp13x3mk37pzr99ljs9awy8ka";
+  };
+
+  buildInputs = [ imlib2 xorg.libX11 ];
+
+  installPhase = ''
+    runHook preInstall
+    mkdir -p $out/bin
+    cp icat $out/bin
+    runHook postInstall
+  '';
+}