enable building with nix

packaging/nix/default.nix

@@ -0,0 +1,34 @@
+{ pkgs ? import <nixpkgs> {} }:
+
+
+# Nix derivation for basic C++ project using clang
+with pkgs; stdenv.mkDerivation {
+  name = "clang-uml";
+  src = ../..;
+
+  buildInputs = [
+    clang
+    libclang
+    cmake
+    llvmPackages_latest.libllvm
+    yaml-cpp
+    ccache
+    elfutils
+    pkg-config
+  ];
+
+  dontUseCmakeConfigure = true;
+
+  buildPhase = "CCACHE_DIR=/build/.ccache make release";
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp release/src/clang-uml $out/bin/clang-uml
+  '';
+
+  postInstall = "
+    installShellCompletion --cmd clang-uml \
+      --zsh packaging/autocomplete/_clang-uml
+      --bach packaging/autocomplete/clang-uml
+  ";
+}