1 files changed, 37 insertions, 0 deletions
diff --git a/overlays/default.nix b/overlays/default.nix
new file mode 100644
index 0000000..63b9906
--- /dev/null
+++ b/overlays/default.nix
@@ -0,0 +1,37 @@
+{
+  inputs,
+  outputs,
+}: {
+  # For every flake input, aliases 'pkgs.inputs.${flake}' to
+  # 'inputs.${flake}.packages.${pkgs.system}' or
+  # 'inputs.${flake}.legacyPackages.${pkgs.system}'
+  flake-inputs = final: _: {
+    inputs =
+      builtins.mapAttrs (
+        _: flake: let
+          legacyPackages = (flake.legacyPackages or {}).${final.system} or {};
+          packages = (flake.packages or {}).${final.system} or {};
+        in
+          if legacyPackages != {}
+          then legacyPackages
+          else packages
+      )
+      inputs;
+  };
+
+  # Adds pkgs.stable == inputs.nixpkgs-stable.legacyPackages.${pkgs.system}
+  stable = final: _: {
+    stable = inputs.nixpkgs-stable.legacyPackages.${final.system};
+  };
+  # This one brings our custom packages from the 'pkgs' directory
+  additions = final: _prev: import ../pkgs final.pkgs;
+
+  # When applied, the unstable nixpkgs set (declared in the flake inputs) will
+  # be accessible through 'pkgs.unstable'
+  stable-packages = final: _prev: {
+    stable = import inputs.nixpkgs-stable {
+      system = final.system;
+      config.allowUnfree = true;
+    };
+  };
+}