update nix build

default-nogui.nix

@@ -0,0 +1,42 @@
+{
+  lib,
+  stdenv,
+  cmake,
+  ncurses,
+  installShellFiles,
+  ...
+}:
+let
+  cmakeContent = builtins.readFile ./CMakeLists.txt;
+  cmakeLines = lib.splitString "\n" cmakeContent;
+  versionLine = lib.findFirst (l: builtins.match ".*set\\(KTE_VERSION \".+\"\\).*" l != null) (throw "KTE_VERSION not found in CMakeLists.txt") cmakeLines;
+  version = builtins.head (builtins.match ".*set\\(KTE_VERSION \"(.+)\"\\).*" versionLine);
+in
+stdenv.mkDerivation {
+  pname = "kte";
+  inherit version;
+
+  src = lib.cleanSource ./.;
+
+  nativeBuildInputs = [
+    cmake
+    ncurses
+    installShellFiles
+  ];
+
+  cmakeFlags = [
+    "-DBUILD_GUI=OFF"
+    "-DCMAKE_BUILD_TYPE=Debug"
+  ];
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/bin
+    cp kte $out/bin/
+
+    installManPage ../docs/kte.1
+
+    runHook postInstall
+  '';
+}