=> Bootstrap dependency digest>=20010302: found digest-20190127
=> Checksum SHA1 OK for stockfish-9-src.zip
=> Checksum RMD160 OK for stockfish-9-src.zip
=> Checksum SHA512 OK for stockfish-9-src.zip
===> Installing dependencies for stockfish-9
=> Tool dependency gmake>=3.81: found gmake-4.2.1nb1
=> Tool dependency nbpatch-[0-9]*: found nbpatch-20151107
=> Tool dependency checkperms>=1.1: found checkperms-1.12
=> Build dependency cwrappers>=20150314: found cwrappers-20180325
===> Skipping vulnerability checks.
WARNING: No /opt/pkg/pkgdb/pkg-vulnerabilities file found.
WARNING: To fix run: `/opt/pkg/sbin/pkg_admin -K /opt/pkg/pkgdb fetch-pkg-vulnerabilities'.
===> Overriding tools for stockfish-9
===> Extracting for stockfish-9
===> Patching for stockfish-9
=> Applying pkgsrc patches for stockfish-9
=> Verifying /opt/pkgsrc/games/stockfish/patches/patch-pawns.cpp
=> Applying pkgsrc patch /opt/pkgsrc/games/stockfish/patches/patch-pawns.cpp
Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|$NetBSD: patch-pawns.cpp,v 1.1 2019/12/20 00:00:55 joerg Exp $
|
|--- pawns.cpp.orig	2019-12-19 22:50:55.102229747 +0000
|+++ pawns.cpp
--------------------------
Patching file pawns.cpp using Plan A...
Hunk #1 succeeded at 223.
done
===> Creating toolchain wrappers for stockfish-9
===> Configuring for stockfish-9
=> Checking for portability problems in extracted files