Optionally disable openstack support in Snabb

default.nix

@@ -5,6 +5,7 @@
 { pkgs ? (import <nixpkgs> {})
 , source ? ./.
 , version ? "dev"
+, supportOpenstack ? true
 }:
 
 with pkgs;
@@ -23,7 +24,7 @@ stdenv.mkDerivation rec {
     for f in $(find src/program/snabbnfv/ -type f); do
       substituteInPlace $f --replace "/bin/bash" "${bash}/bin/bash"
     done
-
+  '' + lib.optionalString supportOpenstack ''
     # We need a way to pass $PATH to the scripts
     sed -i '2iexport PATH=${git}/bin:${mariadb}/bin:${which}/bin:${procps}/bin:${coreutils}/bin' src/program/snabbnfv/neutron_sync_master/neutron_sync_master.sh.inc
     sed -i '2iexport PATH=${git}/bin:${coreutils}/bin:${diffutils}/bin:${nettools}/bin' src/program/snabbnfv/neutron_sync_agent/neutron_sync_agent.sh.inc