Hello,
at least that was what I had to do: adjust permissions to allow access
for non-root user. I did not care enough to see if read-only would
suffice.
pkg-readme might be overkill? message better? Both diffs attached.
Marcus
--- /dev/null Sun Nov 18 13:37:16 2018
+++ graphics/gtkam/pkg/MESSAGE Sun Nov 18 13:36:54 2018
@@ -0,0 +1,2 @@
+To run this software as non-root user you have to adjust permissions
+for /dev/ugen* and /dev/usb* to allow access.
--- /dev/null Sun Nov 18 13:34:38 2018
+++ graphics/gtkam/pkg/README Sun Nov 18 13:28:01 2018
@@ -0,0 +1,6 @@
++-----------------------------------------------------------------------
+| Running ${PKGSTEM} on OpenBSD
++-----------------------------------------------------------------------
+
+For ${PKGSTEM} to run as non-root user you have to adjust permissions
+for /dev/ugen* and /dev/usb* to allow access.
