diff --git a/share/man/man7/freebsd-base.7 b/share/man/man7/freebsd-base.7
--- a/share/man/man7/freebsd-base.7
+++ b/share/man/man7/freebsd-base.7
@@ -50,7 +50,7 @@
 .Dq CURRENT
 .\" re@ will provide their own repository before release, at which
 .\" point this text will need updating.
-branches are hosted on the Internet at 
+branches are hosted on the Internet at
 .Lk https://pkg.freebsd.org .
 These packages are updated when new errata or security updates are
 released (for supported release versions), or twice daily for
@@ -92,8 +92,9 @@
 .El
 .Pp
 The exact set of available subpackages differs for each individual
-package.  For example, some packages may not provide any development
-files, in which case the
+package.
+For example, some packages may not provide any development files,
+in which case the
 .Sy -dev
 subpackage is not present.
 .Sh PACKAGE SETS
@@ -188,10 +189,22 @@
 pkg -r /ppcdev -oABI=FreeBSD:16:powerpc64le \e
     install -r FreeBSD-set-devel
 .Ed
+.Sh DIAGNOSTICS
+.Bl -diag
+.It <package> [FreeBSD-ports] conflicts with [installed] <package>
+.Pp
+The package repos are conflicting.
+View the current configuration with
+.Dq Li pkg -vv .
+Remove the
+.Dq Li FreeBSD
+repo from
+.Xr pkg.conf 5 .
+.El
 .Sh SEE ALSO
+.Xr src.conf 5 ,
 .Xr build 7 ,
-.Xr pkg 8 ,
-.Xr src.conf 5
+.Xr pkg 8
 .Sh HISTORY
 Support for installing the base system as packages was introduced in
 .Fx 15.0 .