pcap-ng and remote capture

So I want to run the WireShark GUI on my local Mac workstation, and remotely capture data from a couple of RHEL7 systems.

From the command line it works fine (using SSH port just to test that I'm capturing packets):
wireshark -k -i <(ssh testlnb1400 "/sbin/dumpcap -P -w - -i eth0 -f 'tcp port 22'")

But from the GUI, using the extcap dialog, it fails with 'capturing from a pipe doesn't support pcapng format'. I tried specifying the -P option to /sbin/dumpcap in the 'remote capture binary' field, it interprets the whole string as the binary name and dies with 'no such file or directory'.

I tried writing a simple wrapper script that prepends the command line arguments with a -P, but then something goes wrong with the filters.

I went to preferences and looked for relevant options. There's a capture.pcap_ng, I tried changing it to FALSE but still fails. I'm assuming that's for local captures, not remote.

I saw some posts about using dpkg to configure the wireshark RPM, but the remote collector is on RHEL and I don't have dpkg available.

So is there some way to either configure the GUI to correctly interpret default dumpcap output (pcap-ng), or to configure the default format output by dumpcap to be libpcap?

Thanks!