symplify nix flake

flake.nix

@@ -1,39 +1,60 @@
 {
   description = "st terminal";
 
-  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-24.11";
+  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
   inputs.flake-utils.url = "github:numtide/flake-utils";
 
   outputs = { self, nixpkgs, flake-utils }:
     flake-utils.lib.eachDefaultSystem (system:
       let pkgs = nixpkgs.legacyPackages.${system};
       in rec {
-        packages = flake-utils.lib.flattenTree {
-          st = pkgs.callPackage ./default.nix { };
+        packages.st = pkgs.stdenv.mkDerivation {
+          pname = "st";
+          version = "ant";
+
+          src = ./.;
+
+          postPatch = pkgs.lib.optionalString pkgs.stdenv.isDarwin ''
+              substituteInPlace config.mk --replace "-lrt" ""
+            '';
+
+          strictDeps = true;
+
+          makeFlags = [ "PKG_CONFIG=${pkgs.stdenv.cc.targetPrefix}pkg-config" ];
+
+          nativeBuildInputs = with pkgs; [ pkg-config ncurses fontconfig freetype ];
+          buildInputs = with pkgs; [ libx11 libxft harfbuzz gd glib imlib2 ];
+
+          preInstall = ''
+            export TERMINFO=$out/share/terminfo
+          '';
+
+          installFlags = [ "PREFIX=$(out)" ];
+
+          passthru.tests.test = pkgs.nixosTests.terminal-emulators.st;
+
+          meta = with pkgs.lib; {
+            description = "st terminal";
+            license = licenses.mit;
+            maintainers = [ "ant" ];
+            platforms = platforms.unix;
+          };
         };
-        defaultPackage = packages.st;
+
         apps.st = flake-utils.lib.mkApp {
           drv = packages.st;
           exePath = "/bin/st";
         };
         apps.default = apps.st;
+        packages.default = packages.st;
         defaultApp = apps.st;
-        devShell = pkgs.mkShell rec {
-          name = "st";
+
+        devShell = pkgs.mkShell {
+          inputsFrom = [ packages.st ];
           packages = with pkgs; [
-            pkg-config
-            xorg.libX11
-            xorg.libXft
-            fontconfig
-            harfbuzz.dev
-            imlib2
-            gd
-            glib
-            # ccls
-            # bear
-            # lldb
-            # gdb
-            # valgrind
+            bear
+            clang-tools
+            gdb
           ];
         };