it finally happened

pkgs/ly.nix

@@ -0,0 +1,41 @@
+{ stdenv, lib, fetchFromGitHub, linux-pam, libxcb, git }:
+
+stdenv.mkDerivation rec {
+  pname = "ly";
+  version = "0.5.0+";
+
+  src = fetchFromGitHub {
+    owner = "fairyglade";
+    repo = pname;
+    rev = "c64f806a68af225cc95623971b5e464abb55b879";
+    sha256 = "sha256-orCqjKlK6U1q7NDoMwxZZE44cyG8yuxdCCk1cQAalP0=";
+    fetchSubmodules = true;
+  };
+
+  nativeBuildInputs = [ git ];
+  buildInputs = [ linux-pam libxcb ];
+  makeFlags = [ "FLAGS=-Wno-error=unused-result" ];
+
+  preBuildPhase = ''
+    mkdir -p ./data
+    export DESTDIR="$PWD"
+    export DATADIR="$PWD/data"
+  '';
+  buildPhase = ''
+    make -j16
+  '';
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp bin/ly $out/bin
+    mkdir -p $out/etc/ly
+    cp -R ./data/* $out/etc/ly
+  '';
+
+  meta = with lib; {
+    description = "TUI display manager";
+    license = licenses.wtfpl;
+    homepage = "https://github.com/fairyglade/ly";
+    maintainers = [ ];
+  };
+}