Which is why a good text editor will balance parentheses automatically and highlight macros. That being said, it is well known that macros can be abused and overused. It is considered bad style to use macros if a function would do the job too.

*Edit:* Guix supports JSON specifications too, though you are of course not as flexible as with Scheme: https://guix.gnu.org/manual/en/html_node/Invoking-guix-packa...

     [
       {
         "name": "myhello",
         "version": "2.10",
         "source": "mirror://gnu/hello/hello-2.10.tar.gz",
         "build-system": "gnu",
         "arguments": {
           "tests?": false
         }
         "home-page": "https://www.gnu.org/software/hello/",
         "synopsis": "Hello, GNU world: An example GNU package",
         "description": "GNU Hello prints a greeting.",
         "license": "GPL-3.0+",
         "native-inputs": ["gettext"]
       },
       {
         "name": "greeter",
         "version": "1.0",
         "source": "https://example.com/greeter-1.0.tar.gz",
         "build-system": "gnu",
         "arguments": {
           "test-target": "foo",
           "parallel-build?": false,
         },
         "home-page": "https://example.com/",
         "synopsis": "Greeter using GNU Hello",
         "description": "This is a wrapper around GNU Hello.",
         "license": "GPL-3.0+",
         "inputs": ["myhello", "hello"]
       }
     ]