nix: clean up package

nix/package.nix

@@ -3,24 +3,29 @@
   lib,
   ...
 }: let
-  inherit (lib) hasSuffix;
-
-  pname = "mdlinkt";
-  version = "0.1.0";
+  fs = lib.fileset;
 in
   buildGoModule {
-    inherit pname version;
+    pname = "mdlinkt";
+    version = "0.1.0";
+
+    src = fs.toSource {
+      root = ../.;
+      fileset = fs.unions [
+        ../go.mod
+        ../go.sum
+        ../main.go
+      ];
+    };
 
-    src = builtins.filterSource (path: type: type != "directory" || hasSuffix path != ".nix") ../.;
     vendorHash = null;
     ldflags = ["-s" "-w"];
 
-    doCheck = false;
-
     meta = {
-      description = "A CLI tool for checking for dead links in a markdown file";
+      description = "CLI tool for checking for dead links in a markdown file";
+      homepage = "https://github.com/notashelf/mdlinkt";
       license = lib.licenses.gpl3Only;
-      mainProgram = pname;
-      maintainers = with lib.maintainers; [NotAShelf];
+      mainProgram = "mdlinkt";
+      maintainers = [lib.maintainers.NotAShelf];
     };
   }

nix/shell.nix

@@ -1,15 +1,14 @@
 {
-  callPackage,
-  gopls,
+  mkShell,
   go,
-}: let
-  mainPkg = callPackage ./package.nix {};
-in
-  mainPkg.overrideAttrs (oa: {
-    nativeBuildInputs =
-      [
-        gopls
+  gopls,
+  delve,
+}:
+mkShell {
+  name = "mdlinkt";
+  packages = [
     go
-      ]
-      ++ (oa.nativeBuildInputs or []);
-  })
+    gopls
+    delve
+  ];
+}