A new start

default.nix

@@ -0,0 +1,31 @@
+let
+  inherit (default.inputs.nixos) lib;
+
+  default = (import ./lib/compat).defaultNix;
+
+  ciSystems = [
+    "aarch64-linux"
+    "i686-linux"
+    "x86_64-linux"
+  ];
+
+  filterSystems = lib.filterAttrs
+    (system: _: lib.elem system ciSystems);
+
+  recurseIntoAttrsRecursive = lib.mapAttrs (_: v:
+    if lib.isAttrs v
+    then recurseIntoAttrsRecursive (lib.recurseIntoAttrs v)
+    else v
+  );
+
+  systemOutputs = lib.filterAttrs
+    (name: set: lib.isAttrs set
+      && lib.any
+      (system: set ? ${system} && name != "legacyPackages")
+      ciSystems
+    )
+    default.outputs;
+
+  ciDrvs = lib.mapAttrs (_: system: filterSystems system) systemOutputs;
+in
+(recurseIntoAttrsRecursive ciDrvs) // { shell = import ./shell.nix; }