Switched to a fork of the Result repo that does not depend on Foundation (outside of tests)

Package.resolved

@@ -3,11 +3,11 @@
     "pins": [
       {
         "package": "Result",
-        "repositoryURL": "https://github.com/antitypical/Result.git",
+        "repositoryURL": "https://github.com/mattpolzin/Result",
         "state": {
           "branch": null,
-          "revision": "8fc088dcf72802801efeecba76ea8fb041fb773d",
-          "version": "4.0.0"
+          "revision": "534d672316477abe29ec4b5ebf65827055b86973",
+          "version": null
         }
       }
     ]

Package.swift

@@ -12,7 +12,7 @@ let package = Package(
             targets: ["JSONAPI"]),
     ],
     dependencies: [
-        .package(url: "https://github.com/antitypical/Result.git", from: "4.0.0")
+        .package(url: "https://github.com/mattpolzin/Result", .revision("534d672316477abe29ec4b5ebf65827055b86973"))
     ],
     targets: [
         // Targets are the basic building blocks of a package. A target can define a module or a test suite.