nix: build directly with buildGoModules

Since we have no dependencies, we don't need a vendor hash, so doing this actually makes sense.

Signed-off-by: Ophestra Umiker <cat@ophivana.moe>

flake.nix

@@ -5,32 +5,52 @@
     nixpkgs.url = "github:NixOS/nixpkgs/24.05";
   };
 
-  outputs = { self, nixpkgs }:
+  outputs =
+    { self, nixpkgs }:
     let
       supportedSystems = [ "x86_64-linux" ];
       forAllSystems = f: nixpkgs.lib.genAttrs supportedSystems (system: f system);
     in
     {
-      devShells = forAllSystems
-        (system:
-          let
-            pkgs = import nixpkgs {
-              inherit system;
+      devShells = forAllSystems (
+        system:
+        let
+          pkgs = import nixpkgs { inherit system; };
+        in
+        {
+          default =
+            let
+              inherit (pkgs)
+                mkShell
+                buildGoModule
+                acl
+                xorg
+                ;
+            in
+            mkShell {
+              packages = [
+                (buildGoModule rec {
+                  pname = "ego";
+                  version = "flake";
+
+                  src = ./.;
+                  vendorHash = null; # we have no dependencies :3
+
+                  ldflags = [
+                    "-s"
+                    "-w"
+                    "-X"
+                    "main.Version=v${version}"
+                  ];
+
+                  buildInputs = [
+                    acl
+                    xorg.libxcb
+                  ];
+                })
+              ];
             };
-          in
-          {
-            default = with pkgs; mkShell
-              {
-                packages = [
-                  clang
-                  acl
-                  xorg.libxcb
-                  (pkgs.writeShellScriptBin "build" ''
-                    go build -v -ldflags '-s -w -X main.Version=flake'
-                  '')
-                ];
-              };
-          }
-        );
+        }
+      );
     };
-}
+}