openfortivpn: fix cross builds (#365328)

Changed files
+3 -1
pkgs
by-name
op
openfortivpn
+3 -1
pkgs/by-name/op/openfortivpn/package.nix
···
"--sysconfdir=/etc"
]
++ lib.optional withSystemd "--with-systemdsystemunitdir=${placeholder "out"}/lib/systemd/system"
-
++ lib.optional withPpp "--with-pppd=${ppp}/bin/pppd";
+
++ lib.optional withPpp "--with-pppd=${ppp}/bin/pppd"
+
# configure: error: cannot check for file existence when cross compiling
+
++ lib.optional (stdenv.hostPlatform != stdenv.buildPlatform) "--disable-proc";
enableParallelBuilding = true;