=> Bootstrap dependency digest>=20010302: found digest-20190127
=> Checksum SHA1 OK for m4-1.4.18.tar.gz
=> Checksum RMD160 OK for m4-1.4.18.tar.gz
=> Checksum SHA512 OK for m4-1.4.18.tar.gz
mkdir: /tmp/pkgbuild/devel/m4: Permission denied
*** Error code 1

Stop.
make: stopped in /usr/pkgsrc/devel/m4