all: embrace unit packages where possible

pkgs/unit/ca/cardboard/package.nix

@@ -0,0 +1,69 @@
+{ stdenv
+, lib
+, fetchFromGitLab
+, cereal
+, cmake
+, libGL
+, libX11
+, libinput
+, libxkbcommon
+, meson
+, ninja
+, pixman
+, pkg-config
+, tl-expected
+, wayland
+, wayland-protocols
+, wlroots
+, xwayland
+}:
+
+stdenv.mkDerivation rec {
+  pname = "cardboard";
+  version = "20210120.g7b15613";
+
+  src = fetchFromGitLab {
+    owner = "cardboardwm";
+    repo = "cardboard";
+    rev = "7b15613e6e1222a6a83d69a2e5da2810dfb45522";
+    sha256 = "044sb0lv1gcywpdncvlv7npxvbsqcc1mwpk0f6i73dinchdz7gmq";
+  };
+
+  patches = [
+    ./0001-use-system-dependencies.patch
+  ];
+
+  # CMake likes to own the configurePhase, but we only need it for dependency
+  # discovery. Remove it.
+  configurePhase = "mesonConfigurePhase";
+
+  nativeBuildInputs = [
+    cmake
+    meson
+    ninja
+    pkg-config
+  ];
+
+  buildInputs = [
+    cereal
+    libGL
+    libX11
+    libinput
+    libxkbcommon
+    pixman
+    tl-expected
+    wayland
+    wayland-protocols
+    wlroots
+  ];
+
+  passthru.providedSessions = [ "cardboard" ];
+
+  meta = with lib; {
+    description = "Scrollable tiling Wayland compositor designed with laptops in mind";
+    homepage = "https://gitlab.com/cardboardwm/cardboard";
+    license = licenses.gpl3;
+    platforms = wlroots.meta.platforms;
+    broken = true;
+  };
+}