WIP: feat(linux-firmware): initial packaging of linux firmware

pkgs/linux-firmware/default.nix

@@ -0,0 +1,38 @@
+{
+  stdenv,
+  pkgs,
+}:
+
+stdenv.mkDerivation {
+  pname = pkgs.linux-firmware.name;
+  version = pkgs.linux-firmware.version;
+  src = pkgs.linux-firmware.src;
+
+  buildInputs = with pkgs; [
+    erofs-utils
+    cryptsetup
+  ];
+
+  nativeBuildInputs = with pkgs; [
+    python3
+    rdfind
+    which
+    zstd
+  ];
+
+  noBrokenSymlinks = true;
+
+  installTargets = [
+    "install-zst"
+    "dedup"
+  ];
+
+  # inspo: https://gitlab.archlinux.org/archlinux/packaging/packages/linux-firmware/-/blob/main/PKGBUILD?ref_type=heads#L93
+  makeFlags = [
+    "DESTDIR=$(out)"
+    "ZSTD_CLEVEL=19"
+    "FIRMWAREDIR=/usr/lib/firmware"
+  ];
+
+  postInstall = ./post-install.sh;
+}