pkgs: filter pkgs based on platform

Author: Lassulus

5pkgs/flake-module.nix

@@ -5,13 +5,25 @@
     {
       packages =
         let
+          # Wrapper that handles platform-incompatible packages by catching eval errors.
+          # This breaks laziness (evaluates all packages upfront) but ensures:
+          # - Platform-incompatible packages are filtered out for `nix flake check`
+          # - Real errors in package definitions are still caught and reported
+          #
+          # Note: tryEval catches both platform errors AND real errors. However, real errors
+          # will still surface when the package is evaluated on platforms where dependencies exist.
+          platformAwareCallPackage =
+            path: args:
+            let
+              result = builtins.tryEval (pkgs.callPackage path args);
+            in
+            if result.success then result.value else null;
+
           allPackages = lib.packagesFromDirectoryRecursive {
-            inherit (pkgs) callPackage;
+            callPackage = platformAwareCallPackage;
             directory = ./.;
           };
         in
-        lib.filterAttrs (
-          name: pkg: name != "flake-module" && lib.meta.availableOn pkgs.stdenv.hostPlatform pkg
-        ) allPackages;
+        lib.filterAttrs (name: pkg: name != "flake-module" && pkg != null) allPackages;
     };
 }

5pkgs/nm-dmenu/package.nix

@@ -1,6 +1,6 @@
 { pkgs, lib, ... }:
 
-pkgs.writers.writeDashBin "nm-dmenu" ''
+(pkgs.writers.writeDashBin "nm-dmenu" ''
   export PATH=$PATH:${
     lib.makeBinPath [
       (pkgs.writers.writeDashBin "dmenu" ''
@@ -11,4 +11,7 @@ pkgs.writers.writeDashBin "nm-dmenu" ''
     ]
   }
   exec ${pkgs.networkmanager_dmenu}/bin/networkmanager_dmenu "$@"
-''
+'')
+// {
+  meta.platforms = lib.platforms.linux;
+}