=> Bootstrap dependency digest>=20010302: found digest-20190127
=> Checksum SHA1 OK for chibi-scheme-0.9.1.tgz
=> Checksum RMD160 OK for chibi-scheme-0.9.1.tgz
=> Checksum SHA512 OK for chibi-scheme-0.9.1.tgz
===> Installing dependencies for chibi-scheme-0.9.1
=> Tool dependency gmake>=3.81: found gmake-4.2.1nb1
=> Tool dependency nbpatch-[0-9]*: found nbpatch-20151107
=> Tool dependency pkgconf-[0-9]*: found pkgconf-1.7.3
=> 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 chibi-scheme-0.9.1
===> Extracting for chibi-scheme-0.9.1
===> Patching for chibi-scheme-0.9.1
=> Applying pkgsrc patches for chibi-scheme-0.9.1
=> Verifying /opt/pkgsrc/lang/chibi-scheme/patches/patch-Makefile
=> Applying pkgsrc patch /opt/pkgsrc/lang/chibi-scheme/patches/patch-Makefile
Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|$NetBSD: patch-Makefile,v 1.2 2020/08/18 10:25:16 leot Exp $
|
|libchibi-scheme.a is generated only on mingw and cygwin operating systems.
|
|--- Makefile.orig	2018-01-24 16:29:50.000000000 +0000
|+++ Makefile
--------------------------
Patching file Makefile using Plan A...
Hunk #1 succeeded at 380 (offset -5 lines).
done
===> Creating toolchain wrappers for chibi-scheme-0.9.1
===> Configuring for chibi-scheme-0.9.1
=> Replacing chibi-scheme interpreter in tools/chibi-doc tools/chibi-ffi tools/snow-chibi tools/snow-chibi.scm.
INFO: [replace-interpreter] Nothing changed in tools/snow-chibi.
=> Checking for portability problems in extracted files