Facter: only export the standard linux package for caching

flake.lock

@@ -268,6 +268,38 @@
       }
     },
     "nixpkgs": {
+      "locked": {
+        "lastModified": 1723603349,
+        "narHash": "sha256-VMg6N7MryOuvSJ8Sj6YydarnUCkL7cvMdrMcnsJnJCE=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "daf7bb95821b789db24fc1ac21f613db0c1bf2cb",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1723991338,
+        "narHash": "sha256-Grh5PF0+gootJfOJFenTTxDTYPidA3V28dqJ/WV7iis=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "8a3354191c0d7144db9756a74755672387b702ba",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_3": {
       "locked": {
         "lastModified": 1724607561,
         "narHash": "sha256-7I922FoAJO9P2YRJrxQx1ufQom3wvozJNL/Ul6eEKLI=",

flake.nix

@@ -58,8 +58,14 @@
           # Inherit the nixos-facter package so its build is chached in clans binary cache
           {
             perSystem =
-              { inputs', ... }:
+              # Facter doesnt have a package for darwin yet.
               {
+                inputs',
+                system,
+                lib,
+                ...
+              }:
+              lib.optionalAttrs (system == "x86_64-linux") {
                 packages.nixos-facter = inputs'.nixos-facter.packages.default;
               };
           }