--- mesonbuild/modules/pkgconfig.py.orig	2020-03-24 04:22:09.000000000 +1100
+++ mesonbuild/modules/pkgconfig.py	2020-08-26 12:04:01.610946000 +1000
@@ -496,7 +496,7 @@
         pcfile = filebase + '.pc'
         pkgroot = kwargs.get('install_dir', default_install_dir)
         if pkgroot is None:
-            if mesonlib.is_freebsd():
+            if mesonlib.is_bsdsunix or mesonlib.is_freebsd():
                 pkgroot = os.path.join(state.environment.coredata.get_builtin_option('prefix'), 'libdata', 'pkgconfig')
             else:
                 pkgroot = os.path.join(state.environment.coredata.get_builtin_option('libdir'), 'pkgconfig')