add default.nix

default.nix

@@ -0,0 +1,21 @@
+{ stdenv, bash
+, flex, bison
+, openssl, gnutls }:
+
+stdenv.mkDerivation {
+  pname = "charybdis";
+  version = "3.5.7";
+
+  src = ./.;
+
+  configureFlags = [
+    "--enable-epoll"
+    "--enable-ipv6"
+    "--enable-openssl=${openssl.dev}"
+    "--with-program-prefix=charybdis-"
+    "--sysconfdir=/etc/charybdis"
+  ];
+
+  nativeBuildInputs = [ bison flex ];
+  buildInputs = [ openssl gnutls ];
+}