Add a nix flake

default.nix

@@ -0,0 +1,56 @@
+{ lib
+, stdenv
+, pkg-config
+, fontconfig
+, freetype
+, libX11
+, libXft
+, harfbuzz
+, gd
+, glib
+, ncurses
+, writeText
+, conf ? null
+, patches ? []
+, extraLibs ? []
+, nixosTests
+, imlib2
+}:
+
+stdenv.mkDerivation rec {
+  pname = "st";
+  version = "0.8.5";
+
+  src = ./.;
+  inherit patches;
+
+  configFile =
+    lib.optionalString (conf != null) (writeText "config.def.h" conf);
+
+  postPatch = lib.optionalString (conf != null) "cp ${configFile} config.def.h"
+    + lib.optionalString stdenv.isDarwin ''
+      substituteInPlace config.mk --replace "-lrt" ""
+    '';
+
+  strictDeps = true;
+
+  makeFlags = [ "PKG_CONFIG=${stdenv.cc.targetPrefix}pkg-config" ];
+
+  nativeBuildInputs = [ pkg-config ncurses fontconfig freetype ];
+  buildInputs = [ libX11 libXft harfbuzz gd glib imlib2 ] ++ extraLibs;
+
+  preInstall = ''
+    export TERMINFO=$out/share/terminfo
+  '';
+
+  installFlags = [ "PREFIX=$(out)" ];
+
+  passthru.tests.test = nixosTests.terminal-emulators.st;
+
+  meta = with lib; {
+    description = "st terminal";
+    license = licenses.mit;
+    maintainers = with maintainers; [ sioodmy ];
+    platforms = platforms.unix;
+  };
+}