newfocus8742: add pyusb dependency (nix only)

artiq/artiq-extras.nix

@@ -83,11 +83,11 @@ in
     src = pkgs.fetchFromGitHub {
       owner = "quartiq";
       repo = "newfocus8742";
-      rev = "2d97eb741f43bd5cb9eec92635101b70ad9c129c";
-      sha256 = "0xzx1p6qn24ckbc8pyxzq8wxn64pvrbwm2l94mblij6dblksdgmv";
+      rev = "31a92595d1cb77d9256b891ec17eed0fbeceb1bc";
+      sha256 = "1dww0y83d4i6nma1q5hnaagih94c32bxlla5p6a5a8zkc4x2pky9";
     };
     pythonOptions = {
-      propagatedBuildInputs = [ artiq ];
+      propagatedBuildInputs = [ pkgs.python3Packages.pyusb artiq ];
       # no unit tests so do a simple smoke test
       checkPhase = "python -m newfocus8742.aqctl_newfocus8742 --version";
     };