Refactor

marp/flake.nix

@@ -17,7 +17,17 @@
         { pkgs, ... }:
         {
           devshells.default = {
-            packages = [ pkgs.marp-cli ];
+            packages = [
+              (pkgs.writeShellApplication {
+                name = "build";
+
+                runtimeInputs = [ pkgs.marp-cli ];
+
+                text = ''
+                  marp slides.md --preview --watch
+                '';
+              })
+            ];
           };
         };
     };

marp/run

@@ -1,3 +0,0 @@
-#!/usr/bin/env sh
-
-marp slides.md --preview --watch